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ASTM D8500-23

(Guide)

Standard Guide for Meeting the Specifications of ASTM D8423

Standard Guide for Meeting the Specifications of ASTM D8423

SIGNIFICANCE AND USE
4.1 Standards and practices for assuring safety, quality, and weight stabilization during key steps of the cannabis/hemp flowers’ sojourn are in order.  
4.2 This standard is intended to assure safety, quality, and weight stabilization of packaged cannabis/hemp flower during storage.  
4.3 This standard is intended to be used by purveyors who store the packaged cured flower between packaging and subsequent transfer to other licensed operators or to the end user.  
4.4 This standard is intended to be used by samplers and testing laboratories storing samples prior to laboratory analyses to assure that samples analyzed represent as accurately as possible, the material that was gathered to provide the sample for analysis.
SCOPE
1.1 Specification D8423 covers the environmental conditions, such as temperature, humidity, and lighting under which the cured dry cannabis/hemp flowers packaged in fresh format and intended for human use can be maintained in storage to assure the safety, quality, and weight stabilization of the packaged flower. This guide suggests means by which the purveyor of storage of cannabis/hemp can meet those specifications.  
1.1.1 This standard does not apply to frozen cannabis/hemp.  
1.1.2 This standard does not apply to cannabis/hemp intended for extraction.  
1.2 The standard applies to controlling the environment surrounding packaged cannabis/hemp flower during storage, either within the package itself or in the environment surrounding the package, or both.  
1.3 This standard is to be followed by licensed operators in the cannabis/hemp space who move the packaged crop(s) through the distribution supply chain to another licensed operator or to the end user.  
1.4 Purveyors of cannabis/hemp flower include, but are not necessarily limited to: the packager, transportation companies, warehousing operations, and retail operations.  
1.5 Security of the packaged cannabis/hemp flower while in storage is not within the scope of this standard.  
1.6 This standard is intended to remain valid until ownership of the packaged cannabis/hemp flower is transferred to another licensed operator or to the final consumer.  
1.7 Authorities having jurisdiction may have additional or alternate requirements which shall take precedence or supersede this standard.  
1.8 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.9 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

Status
Published
Publication Date
30-Apr-2023
ICS
11.120.99 - Other standards related to pharmaceutics
Technical Committee
D37 - Cannabis
Drafting Committee
D37.04 - Processing and Handling
Current Stage
Ref Project

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ASTM D8500-23 - Standard Guide for Meeting the Specifications of ASTM D8423ASTM D8500-23 - Standard Guide for Meeting the Specifications of ASTM D8423
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ASTM D8500-23 - Standard Guide for Meeting the Specifications of ASTM D8423
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D8500 − 23
Standard Guide for
1
Meeting the Specifications of ASTM D8423
This standard is issued under the fixed designation D8500; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
In the cannabis/hemp industry, fairness in the marketplace for cannabis/hemp products is desired.
Thus, standards for assuring safety, quality, and weight stabilization during key steps of the
cannabis/hemp flowers sojourn are in order. While there are numerous means of meeting or exceeding
the specifications of Specification D8423, additional guidance will provide purveyors who store the
cured crop from the point the packaging process is complete until it is passed to another licensed
operator or to the end user, an assist in meeting or exceeding the specifications.
1. Scope 1.7 Authorities having jurisdiction may have additional or
alternate requirements which shall take precedence or super-
1.1 Specification D8423 covers the environmental
sede this standard.
conditions, such as temperature, humidity, and lighting under
1.8 This standard does not purport to address all of the
which the cured dry cannabis/hemp flowers packaged in fresh
safety concerns, if any, associated with its use. It is the
format and intended for human use can be maintained in
responsibility of the user of this standard to establish appro-
storage to assure the safety, quality, and weight stabilization of
priate safety, health, and environmental practices and deter-
the packaged flower. This guide suggests means by which the
mine the applicability of regulatory limitations prior to use.
purveyor of storage of cannabis/hemp can meet those specifi-
1.9 This international standard was developed in accor-
cations.
dance with internationally recognized principles on standard-
1.1.1 This standard does not apply to frozen cannabis/hemp.
ization established in the Decision on Principles for the
1.1.2 This standard does not apply to cannabis/hemp in-
Development of International Standards, Guides and Recom-
tended for extraction.
mendations issued by the World Trade Organization Technical
1.2 The standard applies to controlling the environment
Barriers to Trade (TBT) Committee.
surrounding packaged cannabis/hemp flower during storage,
either within the package itself or in the environment surround-
2. Referenced Documents
ing the package, or both.
2
2.1 ASTM Standards:
1.3 This standard is to be followed by licensed operators in
D8196 Practice for Determination of Water Activity (a ) in
w
the cannabis/hemp space who move the packaged crop(s)
Cannabis Flower
through the distribution supply chain to another licensed
D8197 Specification for Maintaining Acceptable Water Ac-
operator or to the end user.
tivity (a ) Range (0.55 to 0.65) for Dry Cannabis Flower
w
1.4 Purveyors of cannabis/hemp flower include, but are not
Intended for Human/Animal Use
necessarily limited to: the packager, transportation companies,
D8233 Guide for Packaging and Labeling of Consumer
warehousing operations, and retail operations.
Resin Cannabis Products for Sale to Adult Consumers,
Legally Authorized Medical Users, and Caregivers in a
1.5 Security of the packaged cannabis/hemp flower while in
Business-to-Consumer Retail Environment (Retailers)
storage is not within the scope of this standard.
D8270 Terminology Relating to Cannabis
1.6 This standard is intended to remain valid until owner-
D8309 Guide for Stability Testing of Cannabis-Based Prod-
ship of the packaged cannabis/hemp flower is transferred to
ucts
another licensed operator or to the final consumer.
1 2
This guide is under the jurisdiction of ASTM Committee D37 on Cannabis and For referenced ASTM standards, visit the ASTM website, www.astm.org, or
is the direct responsibility of Subcommittee D37.04 on Processing and Handling. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved May 1, 2023. Published June 2023. DOI: 10.1520/ Standards volume information, refer to the standard’s Document Summary page on
D8500-23. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D8500 − 23
D8423 Specification for Environmental Conditions for Post- placement of packaged cannabis/hemp flower to prevent cross
packaged Storage and Retail Merchandising of Cannabis/ contamination of the various cat
...

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ASTM D8270-23b(Terminology)
Standard Terminology Relating to Cannabis

SCOPE
1.1 This terminology is a compilation of definitions of technical terms used in the cannabis industry. Terms that are generally understood or adequately defined in other readily available sources are not included.  
1.2 When a term is used in an ASTM document for which Committee D37 is responsible it is included only when judged, after review by Subcommittee D37.91, to be a generally usable term.  
1.3 Definitions that are identical to those published by other ASTM committees or other standards organizations are identified with the committee number (for example, D20) or with the abbreviation of the name of the organization (for example, IUPAC, International Union of Pure and Applied Chemistry).  
1.4 A definition is a single sentence with additional information included in discussions.  
1.5 Definitions are followed by the committee responsible for the standard(s) (for example, [D37.01]) and standard designation(s) in which they are used (for example, D8219).  
1.6 Abbreviated Terminology:  
1.6.1 Abbreviated terminology is intended to provide uniform contractions of terms relating to cannabis that have evolved through widespread common usage. The compilation in this standard has been prepared to avoid the occurrence of more than one abbreviated term for a given cannabis term and to avoid multiple meanings for abbreviated terms.  
1.6.2 The abbreviated terminology and descriptions in this standard are intended to be consistent with usage in the cannabis industry and the standards under D37 jurisdiction. Other ASTM committees may assign a different word-phrase description to the same abbreviated terminology. In such cases, the abbreviated terms in this standard shall apply to usage in D37 standards, or if widespread misunderstanding could result from conflicting abbreviated terminology descriptions, the abbreviated terminology for the word-phrase shall not be used in D37 standards.  
1.6.3 Acronyms and Initialisms—A word formed from the letters or parts of words of a longer word-phrase, usually from the initial letters or parts of the words. An acronym is pronounced as a word (for example, radar for radio detection and ranging). An initialism is pronounced as a series of letters (for example, DOT for Department of Transportation).  
1.6.4 The acronym or initialism description is the origin word-phrase for the acronym or initialism, not a definition.  
1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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ASTM D8498-23(Guide)
Standard Guide for Compliance to the Specifications of ASTM D8450

SIGNIFICANCE AND USE
4.1 Standards and practices for assuring safety, quality, and weight stabilization during key steps of the cannabis/hemp flowers sojourn are in order.  
4.2 This guide is intended to assist in assuring safety, quality, and weight stabilization of cannabis/hemp flower during indoor packaging operations.  
4.3 This guide is intended to assist in assuring that packaged cannabis/hemp flower has a water activity of 0.55 to 0.65 per Specification D8197.  
4.4 This guide is intended to be used by purveyors who move the cured crop to consumer or non-consumer packaging used for distribution.
SCOPE
1.1 Specification D8450 specifies the environmental conditions, such as temperature, humidity, and lighting under which the cured, dry, cannabis/hemp flowers in fresh format intended for human use are to be packaged to assure the safety, quality, and weight stabilization of the packaged flower. This guide suggests means by which the packager of cannabis/hemp can meet Specification D8450.  
1.1.1 This guide does not apply to frozen cannabis/hemp.  
1.1.2 This guide does not apply to cannabis/hemp intended for extraction.  
1.2 This guide applies only to controlling an indoor environment (heat, cooling, humidity control, lighting) surrounding packaging operations. Outdoor operations are outside the scope of this guide and are not addressed.  
1.3 This guide can be used by licensed operators in the cannabis/hemp space who move the cured crop(s) into consumer or non-consumer packaging used for distribution.  
1.4 Security of the cannabis/hemp flower during the packaging process is not within the scope of this guide.  
1.5 This guide is intended to remain valid until the packaged cannabis/hemp flower is placed in storage or transit.  
1.6 Authorities having jurisdiction may have additional or alternate requirements which shall take precedence or supersede this guide.  
1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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ASTM D8499-23(Guide)
Standard Guide for Meeting the Specifications of ASTM D8432

SIGNIFICANCE AND USE
4.1 Standards and practices for assuring safety, quality, and weight stabilization during key steps of the cannabis/hemp flowers’ sojourn are in order.  
4.2 This standard is intended to assure safety, quality, and weight stabilization of packaged cannabis/hemp flower during transit operations.  
4.3 This standard is intended to be used by purveyors who move the packaged cured flower between licensed operators or to the end user.  
4.4 This standard is intended to be used by samplers and testing laboratories transporting samples to a laboratory to assure that samples analyzed represent as accurately as possible, the material that was gathered to provide the sample for analysis.
SCOPE
1.1 Specification D8432 covers the environmental conditions, such as temperature, humidity, and lighting under which the cured, dry, cannabis/hemp flowers packaged in fresh format and intended for human use can be maintained in transit to assure the safety, quality, and weight stabilization of the packaged flower. This guide suggests means by which the purveyor of transportation of cannabis/hemp can meet those specifications.  
1.1.1 This standard does not apply to frozen cannabis/hemp.  
1.1.2 This standard does not apply to cannabis/hemp intended for extraction.  
1.2 This standard applies to controlling the environment surrounding packaged cannabis/hemp flower in transit, either within the package itself or in the environment surrounding the package, or both.  
1.3 This standard is to be followed by licensed operators in the cannabis/hemp space who move the packaged crop(s) through the distribution supply chain to another licensed operator or to the end user.  
1.4 Purveyors of cannabis/hemp flower include, but are not necessarily limited to: the packager, transportation companies, warehousing operations, and retail operations.  
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1.7 Authorities having jurisdiction may have additional or alternate requirements which shall take precedence or supersede this standard.  
1.8 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
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ASTM D8399-23(Test Method)
Standard Test Method for Multi-residue Analysis of Pesticides in Dried Cannabis and Hemp Raw Materials Using Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)

SIGNIFICANCE AND USE
5.1 The analysis and reporting of pesticide content in all forms of cannabis raw material that is grown or processed or both, with the intent of ingestion or consumption, is required to address health and safety concerns, satisfy testing and labeling requirements, and meet the regulatory guidelines of various jurisdictions where cannabis has been legalized for ingestion or consumption for medicinal or recreational purposes, or both. This test method is useful in providing quantitative results for the analytes listed in Table 1, which is a subset of the pesticide testing requirements found in regulatory documents for cannabis, not limited to and including Canada, many U.S. states where legalization has occurred, and the European Pharmacopeia (1-4). This test method may be appropriate for additional pesticide and growth regulator analytes, which may be added to those of Table 1 provided validation is performed in accordance with Practice D8282. Analytes may be removed from Table 1 without additional validation.
SCOPE
1.1 This test method allows for the concentration determination of the pesticides listed in Table 1 and shall apply to any dried raw material from a cannabis plant (Note 1, Note 2) regardless of the type of cannabis plant from which it was derived (1, 2).2 For the sake of brevity, the term “cannabis” shall be used from now on to refer to any type of cannabis plant including those which can be classified as hemp. The procedure includes sub-sampling a ground, homogenous sample, liquid-solid extraction with acetonitrile:acetic acid (100:1, v:v), solid phase extraction with C18 SPE media, dilution in 3 mM ammonium formate in water with 0.1 % formic acid and 3 mM ammonium formate in methanol with 0.02 % formic acid in a 20:80 ratio (v:v) and analysis by LC-MS/MS. This procedure encompasses the entire process from sample preparation to analyte quantitation encompassing a range of 0.005 µg/g to 0.500 µg/g.  
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Note 2: Certain jurisdictions or regulations may require specific parts of the plant to be included or excluded for analysis and those regulations will take precedence for the selection of plant parts.  
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1.3 Table 1 lists the analytes measured by this test method.  
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ASTM D8375-23(Test Method)
Standard Test Method for Determination of Cannabinoid Concentration in Dried Cannabis and Hemp Raw Materials using Liquid Chromatography Tandem Mass Spectrometry (LC-MS/MS)

SIGNIFICANCE AND USE
5.1 The analysis and reporting of cannabinoid content in cannabis and hemp is required to address human health and safety concerns, satisfy testing and labeling requirements, and meet the regulatory guidelines of various jurisdictions. This test method is useful in providing quantitative results for up to seventeen cannabinoids in dried cannabis and hemp raw material samples.
SCOPE
1.1 This test method allows for the concentration determination of the cannabinoids listed in Table 1, and shall apply to any dried raw material from a cannabis plant (Note 1, Note 2) regardless of the type of cannabis plant from which it was derived.2 For the sake of brevity, the term “cannabis” shall be used from now on to refer to any type of cannabis plant including those that can be classified as hemp. The procedure includes sub-sampling a ground, homogeneous sample, extraction with methanol:water (80:20, v:v),3,4 dilution in methanol and analysis by liquid chromatography tandem mass spectrometry (LC-MS/MS). The method allows for a wide-range of sample concentrations to be determined by using a 1000-fold calibration range and the option to perform multiple levels of sample dilution. The calibration curve is prepared in methanol over a range of 10 ng/mL to 10 000 ng/mL for all seventeen cannabinoids, or a subset of cannabinoids if desired, while the sample extracts are diluted in methanol into the calibration range.3,4,5 For example, a 1/500 dilution of sample extracts allows concentration determination over a range of 0.5 mg/g to 500 mg/g in cannabis. The method was validated with quality control samples prepared in methanol, a candidate certified reference material (CRM), and repeat extraction and analysis of cannabinoid samples.3  
Note 1: For this test method, dried raw material from a cannabis plant includes one or more of inflorescence, leaves, or stems.
Note 2: Certain jurisdictions or regulations may require specific parts of the plant to be included or excluded for analysis and those regulations will take precedence for the selection of plant parts.  
1.2 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 List of Measurable Analytes—See Table 1.  
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
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ASTM D8493-23(Guide)
Standard Guide for Sample Preparation of Cannabis and Hemp Inflorescence for Laboratory Analysis

SIGNIFICANCE AND USE
5.1 The sample preparation procedure for comminution impacts other downstream processes such as extraction and sonication, which ultimately affects the total analytical error (TAE) and measurement uncertainty.  
5.2 Factors that may influence the sample preparation process include the prevention of cross-contamination (carryover) from a prior sample and an inadequate cleaning procedure between preparation of samples, poor sample handling, storage (sample preservation), and moisture content (drying methods) of plant material being greater than 15 % (15). Samples with high moisture content are hard to process completely and may yield lower analyte (that is, cannabinoid) concentration during extraction and further processing. Lastly, water activity Specification D8197 is recommended, activity (aw) range (0.55 to 0.65) for dry cannabis or hemp flower or both.  
5.3 There are many different types of hardware technologies that address the comminution of dried cannabis or hemp; however, the list of devices is exhaustive and thus beyond the scope of this guide. See Table 3 and Table 4  (16-18) for a summary of different milling technologies. Distinctions among various pieces of equipment often relate to the type, mass, and size/shape of the sample (dry, fibrous) for which each is most effective. In addition, there may be economic reasons for mill selection, that is, the sample throughput of the testing laboratory (number of samples per day), access to cryogenics, and sample mass requirements.    
5.4 In addition to sampling devices, this guide does not include the sample preparation of edibles, tinctures, oils/concentrates, beverages, and so forth in which the sample diversity poses significant sample preparation challenges to be put forward in additional work items.  
5.5 The sample size for comminution purposes is limited as the analytical testing portion required is often 500 times smaller than the bulk sample lot and not every testing laboratory is equipped to handl...
SCOPE
1.1 In this guide, the basic steps in obtaining a test portion sample of either dried cannabis/hemp inflorescence are outlined.  
1.2 Sample preparation depends on many factors including moisture (dryness) of the sample, the analyte to be measured, the concentrations/amounts, and the test method's precision and accuracy requirements. In this case, dried cannabis or hemp plant material require particle size reduction-comminution from a representative sample of which the final analytical testing portion is determined by the employed testing method. Local regulatory guidelines often dictate both the representative sample that is taken from the bulk material (harvest batch) and the final mass of the test portion (for example  
1.3 This guide will not purport to meet every local and state jurisdiction since different regulatory requirements vary; the local/state requirements are at the discretion of the user to follow and interpret.  
1.4 Units—The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard.  
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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ASTM D8439-22(Specification)
Standard Specification for Medicinal-use Cannabis Inflorescence

SCOPE
1.1 This standard defines the specifications (appropriate tests, their analytical methods and acceptance criteria) for the identification, strength (for example, cannabinoid content), and purity (for example, limits for contaminants) for medicinal-use cannabis inflorescence.  
1.2 This specification references approved analytical methods used to verify the specifications, and in the absence of approved analytical methods, a suggested method for validating such specifications.  
1.3 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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ASTM D8452-22(Guide)
Standard Guide for Requirements for Medical-related Professionals within the Cannabis and Hemp Industries

SIGNIFICANCE AND USE
5.1 As patient use of cannabis and hemp for medical purposes increases and medical professionals are increasingly called upon to provide medical advice, the following requirements and expectations within the medical profession are increasingly significant, requiring:  
5.1.1 Availability by patients to qualified medical professionals who can provide safe and objective advice on the medical use of cannabis and hemp,  
5.1.2 Clarity by medical professionals on the legal restrictions in their area of jurisdiction to ensure compliance, and  
5.1.3 Development of qualified training and certificate programs to ensure safe and quality healthcare for patients.  
5.2 The primary objectives of this guide are as follows:  
5.2.1 Provide a general overview of the BoK required for the professions listed in Section 7; and  
5.2.2 Provide recommendations to form the foundation for training and subsequent recognition/certificate systems that enable consumers, employers, organizational management, government agencies, and others who rely upon medical professionals to distinguish between qualified and non-qualified workers.  
5.2.3 Recommend requirements that agencies can use to develop and document the specific criteria used for training or certificate programs.  
5.3 Users of this guide shall document deviations from the recommended requirements to inform their clients of the criteria applied in either the training or the certificate programs offered. As the cannabis and hemp industries and medical guidelines mature, this guide will be updated to reflect current thinking and requirements.  
5.4 The Bok elements are applicable to certificate programs, while the BoK, experiential and educational elements are applicable to certification process requirements.
SCOPE
1.1 This guide can provide certification bodies, training providers, employers, and certificate issuers, with best-practice guidance for administering their respective programs for medical-related professions within the cannabis and hemp industries.  
1.2 This guide recommends requirements for experience, training, education, and the body of knowledge (BoK) necessary for medical-related professions within the cannabis and hemp industries listed in Table 1.  
1.3 For purposes of this guide, a medical professional is defined as a person qualified and licensed as required by the jurisdiction to provide guidance or recommendations regarding a person's health or fitness.  
1.4 This guide provides recommendations for articulating professional requirements for training and education or earning certificates. It is part of a series of guides denoting certification requirements for professions within the cannabis and hemp industries (Guides D8346, D8347, D8348), and supporting Practice D8403 for associated certificate programs.  
1.5 This guide's content does not supersede requirements for training or earning a certificate defined by jurisdictional entities such as government or other regional regulatory bodies.  
1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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ASTM D8469-22(Test Method)
Standard Test Method for Analysis of Multiple Elements in Cannabis Matrices by Inductively Coupled Plasma Mass Spectrometry (ICP-MS)

SIGNIFICANCE AND USE
5.1 Medical and/or recreational marijuana (cannabis) has been legalized for adult use in many countries and states within the USA (5). Many jurisdictions that permit the use of medicinal and recreational marijuana require testing of cannabis and associated products to ensure safety from contaminants, especially the toxic “big four” elements such as As, Cd, Hg, and Pb (6), and other metals worthy of consideration (6). These heavy metals can accumulate in plants grown in polluted soils or contamination can occur during the manufacturing process (7). In addition to ensuring product safety, the analysis of mineral and other trace elements is required for labeling purposes when these products are sold as nutritional supplements. Trace element analysis of plant and nutritional supplement materials is a well-established application (8). Following acidic digestion to break down the plant-based samples' primary components, ICP-MS is often used for quantitative analysis because of its multi-element capability, high sensitivity, speed, robustness, and wide dynamic range.  
5.2 This test method covers the rapid determination of multiple elements in cannabis sample digests. The elements include the priority toxic elements (As, Cd, Hg, and Pb), as well as elements required by some states and elements of interest in the cannabis community (V, Cr, Cu, Zn, Sb, Ba, Se, Ag, Na, Al, K, Mn, Fe, Co, Ni, Mo, Tl, Th, and U). Irrespective of the number of elements being measured, test times are approximately a few minutes per test specimen, and detectability for most elements is in the low- to sub-ppb range.
SCOPE
1.1 This test method uses inductively coupled plasma mass spectrometry (ICP-MS) to determine multiple trace elements in cannabis and cannabis-related matrices following sample preparation using microwave-assisted acid digestion. This test method is applicable to the quantification of trace levels of elements in dried plant materials, concentrates, oils, extracts, tinctures of cannabis and cannabis-related products. Other matrices may be added provided that the lab validates the extra matrices using Practice D8282. Details are provided on the validation of both the sample preparation procedure and analytical method using certified reference materials (CRMs) and validation of the analytical method using spike recovery testing of several cannabis based samples.  
1.2 This test method should be used by analysts experienced in the use of microwave digestion and ICP-MS, matrix interferences, and procedures for their correction or reduction, and should only be used by personnel trained in the handling, preparation, and analysis of samples for the determination of trace elements in cannabis and cannabis products (1).2 This test method was developed using a single quadrupole ICP-MS equipped with a collision/reaction cell (CRC) that can be pressurized with helium (He) gas for the removal of polyatomic interferences using kinetic energy discrimination (KED). This test method can also be run using a triple quadrupole or “tandem” mass spectrometer (MS/MS) ICP-MS instrument, which is fitted with CRC technology. The ICP-MS method accounts for polyatomic interferences, which are the most common spectral overlaps in ICP-MS, isobaric interferences, and any potential doubly-charged ion interferences (M2+) that may arise from the presence of rare earth elements (REEs) in the samples, as the REE2+ ion interferences can affect the accuracy of the measurement of arsenic (As) and selenium (Se) in the samples. Table 1 lists elements for which the test method applies along with recommended analytical masses, and secondary masses for some elements. The priority toxic elements arsenic (As), cadmium (Cd), mercury (Hg), and lead (Pb), also sometimes referred to as the “big four” toxic trace elements are listed separately because of their toxicity, as discussed in 5.1.  
1.3 Certified reference materials (CRMs) should be matrix matc...

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ASTM
ASTM D8442-22(Test Method)
Standard Test Method for Determination of Cannabinoids in Cannabis Raw Materials and Resin Cannabis Products by Gas Chromatography and Flame Ionization Detection

SIGNIFICANCE AND USE
5.1 Gas chromatography and flame ionization detection provides a rapid means to identify and quantify cannabinoids in a variety of samples of interest. This test method allows producers of cannabis products to improve and optimize the quality of their products. For example, hemp extractors can use it to determine the efficiency of extraction processes and to verify that products meet regulatory requirements, ensuring safety and quality of products.  
5.2 Cannabinoids, such as CBD and THC can be monitored throughout the production process. The determination of Δ9-THC is often required for regulatory purposes and the determination of other THC isomers is often of interest. The United Nations Office on Drugs and Crime provides experimental details and guidance for use of GC to analyze cannabis related samples, including conditions suitable for decarboxylation of cannabinoid acids.3  
5.3 Post-decarboxylated methodology is used. In decarboxylation, heat is used to liberate carbon dioxide from carboxylic acid cannabinoids, forming their corresponding neutral cannabinoids, for example, THC from THCA. It should be recognized that the hot temperature of the GC injection port itself is capable of effecting at least some decarboxylation (250 °C – Table 2), and many sample types, such as distillates, require no decarboxylation because it would have occurred during material processing. Therefore, some knowledge of sample properties and material processing is useful. Resulting determinations are for the total cannabinoid content of specific isomers, for example, total Δ9-THC. For those samples requiring decarboxylation, the method is validated per Practice D8282 through the use of reference materials, spike and recovery of knowns, or through comparison with LC results. For example, carrying out the decarboxylation procedure of a standard containing known amounts of CBDA and CBN should yield the correct amounts of CBD and CBN, where CBN is not significantly changed and the mass...
SCOPE
1.1 This test method covers the analysis of cannabinoids in cannabis products by gas chromatography (GC) and flame ionization detection (FID).  
1.2 This test method is applicable to cannabis raw materials and resin cannabis products as defined in Guide D8245, including those from hemp. Such material includes: biomass; plant material; flowers; resins; extracts; distillates; recovered solvents; and other intermediate processing material. The applicable concentration range of analysis will vary to some extent depending on the nature of the sample, for instance measurement of delta-9-tetrahydrocannabinol (Δ9-THC) for regulatory purposes in hemp would require calibration to lower concentration levels compared to measurement of CBD in its isolate; however, in most cases, the test method is applicable to the determination of major and minor cannabinoids above about 0.1 mass% in concentration. Dilution of sample solutions is used to adjust concentrations to fall within appropriate calibration curves. Particular emphasis is placed on the determination of Δ9-THC for regulatory compliance purposes and control. This test method can measure any cannabinoid that is eluted and detected from a GC column with sufficient resolution from any interfering compounds. Typical cannabinoids of interest that can be determined by this test method are shown in Table 1. Use of an HPLC technique is recommended if individual measurement of acids, such as THCA, is required.  
1.3 The test method does not purport to identify all individual cannabinoids; however, individual users can adapt this test method for specific custom analyses to meet their needs.  
1.4 Units—Values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard.  
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard t...

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