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ASTM D8457-22

(Practice)

Standard Practice for Cleaning Glass and Plastic Labware Used in Metal and Metalloid Analyses

Standard Practice for Cleaning Glass and Plastic Labware Used in Metal and Metalloid Analyses

SIGNIFICANCE AND USE
5.1 This practice is intended for use in laboratories using labware for the preparation and analysis of samples collected for analysis for metals or metalloids, or both.
SCOPE
1.1 This practice uses dilute nitric acid to clean glass and plastic labware used in laboratories preparing and analyzing samples for metal and metalloid content.  
1.2 The values stated in SI units are to be regarded as standard.  
1.3 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.  
1.4 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-2022
ICS
71.040.10 - Chemical laboratories. Laboratory equipment
Technical Committee
D22 - Air Quality
Drafting Committee
D22.01 - Quality Control
Current Stage
Ref Project

Relations

Refers
ASTM D1356-20a - Standard Terminology Relating to Sampling and Analysis of Atmospheres
Effective Date
01-Sep-2020
Refers
ASTM D1356-20 - Standard Terminology Relating to Sampling and Analysis of Atmospheres
Effective Date
15-Mar-2020

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ASTM D8457-22 - Standard Practice for Cleaning Glass and Plastic Labware Used in Metal and Metalloid AnalysesASTM D8457-22 - Standard Practice for Cleaning Glass and Plastic Labware Used in Metal and Metalloid Analyses
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ASTM D8457-22 - Standard Practice for Cleaning Glass and Plastic Labware Used in Metal and Metalloid Analyses
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Standards Content (Sample)

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: D8457 − 22
Standard Practice for
Cleaning Glass and Plastic Labware Used in Metal and
1
Metalloid Analyses
This standard is issued under the fixed designation D8457; 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.
1. Scope 4.2 Alternatively, labware is soaked in dilute nitric acid in a
plastic tub in a fume hood, rinsed with ASTM Type I Water,
1.1 This practice uses dilute nitric acid to clean glass and
and allowed to dry in a fume hood.
plastic labware used in laboratories preparing and analyzing
samples for metal and metalloid content.
5. Significance and Use
1.2 The values stated in SI units are to be regarded as
5.1 This practice is intended for use in laboratories using
standard.
labware for the preparation and analysis of samples collected
1.3 This standard does not purport to address all of the
for analysis for metals or metalloids, or both.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
6. Reagents and Materials
priate safety, health, and environmental practices and deter-
6.1 Purity of Reagents—Reagent grade chemicals shall be
mine the applicability of regulatory limitations prior to use.
used in this practice. Unless otherwise indicated, it is intended
1.4 This international standard was developed in accor-
thatallreagentsconformtothespecificationsoftheCommittee
dance with internationally recognized principles on standard-
on Analytical Reagents of the American Chemical Society,
ization established in the Decision on Principles for the
where such specifications are available. Other grades may be
Development of International Standards, Guides and Recom-
used, provided it is first ascertained that the reagent is of
mendations issued by the World Trade Organization Technical
sufficiently high purity to permit its use without lessening
Barriers to Trade (TBT) Committee.
accuracy of the determination.
2. Referenced Documents
6.2 Nitric Acid—Concentrated, 16.0 M HNO , suitable for
3
2
2.1 ASTM Standards: atomic spectrometry analysis such as spectroscopic grade.
D1129 Terminology Relating to Water
6.3 Purity of Water—Unless otherwise indicated, references
D1193 Specification for Reagent Water
to water shall be understood to mean reagent water as defined
D1356 Terminology Relating to Sampling and Analysis of
by Type 1 of Specification D1193.
Atmospheres
7. Procedure
3. Terminology
7.1 Wash glassware and plastic equipment with laboratory
3.1 Definiti
...

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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.  
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SCOPE
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4.1 Laboratories are integral to cannabis/hemp industry operations and consumer safety and satisfaction. Standardized laboratory practices play a key role in establishing and demonstrating product safety, quality, and compliance with the regulations that govern product quality and safety.  
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1.5 This guide applies to all cannabis/hemp containing products commercially manufactured and distributed for consumer use.  
1.6 Units—The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard.  
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Standard Practice for Sampling of Cannabis/Hemp Post-Harvest Batches for Laboratory Analyses

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5.1 This standard will provide best practices for the sampling of harvested cannabis inflorescence with the intent to assure representative sampling.  
5.2 The laboratory results and their respective harvest batch associations have implications and significance to regulatory requirements, quality control considerations throughout the product’s life cycle, and the safety of the consumers who may be adversely affected by consumption of product that was not tested in a homogeneous manner (3).  
5.3 This standard does not address the appropriate sampling of processed cannabis materials such as such as extracts, seeds, edibles, topicals, etc.  
5.4 This standard addresses the sampling of cannabis inflorescence destined for human or animal consumption.  
5.5 This standard does not address pre-harvest field sampling or large untrimmed or unprocessed harvest batches.
SCOPE
1.1 Cannabis harvested materials require sampling strategies throughout their life cycle, from cultivation to the end consumer. For purposes of this standard, the term cannabis is inclusive of all cannabis inflorescence, including hemp varieties. The qualitative and quantitative characteristics of cannabis/hemp for human or animal consumption has safety implications throughout the life cycle from cultivation to end consumer. This standard provides best practice procedures and protocols for sampling batches of harvested cannabis inflorescence. Cannabis/hemp materials often exhibit variability across different parts within the same plant or across different plants within the same cultivar, or both, (1, 2).2 Thus, sampling strategies are required which yield a representative a sample across a harvest batch. Representative sampling is required to ensure that the qualitative and quantitative test results accurately reflect cannabinoid identification, potency, identification and concentration of terpenes, concentration of trace metals, microbiological activity, mycotoxins, and concentration of pesticides across the batch.  
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SCOPE
1.1 Polarimeters and polariscopes used for measuring stress in glass are described in Test Methods F218, C148, and C978. These instruments include a light source and several optical elements (polarizers, optical retarders, filters, and so forth) that require occasional cleaning, realigning, and calibration. The objective of these practices is to describe the calibration and verification procedures required to maintain these instruments in calibration and ensure that the optical setup is within specification for satisfactory measurements.  
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1.3 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 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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