ASTM E2941-14

Standard Practices for Extraction of Elements from Ores and Related Metallurgical Materials by Acid Digestion

SIGNIFICANCE AND USE
4.1 These practices are primarily intended to test materials for compliance with compositional specifications and for monitoring. Partial extraction of ores and related metallurgical materials can provide information on the availability of elements to leaching, water quality changes, or other site conditions.  
4.2 It is assumed that the users of these practices will be trained analysts capable of performing common laboratory procedures skillfully and safely. It is expected that work will be performed in a properly equipped laboratory and that proper waste disposal procedures will be followed. Appropriate quality control practices such as those described in Guide E882 shall be followed.
SCOPE
1.1 These practices cover the digestion of ores and related metallurgical materials, such as mine soil, waste rock and tailings, for subsequent determination of acid-extractable contents of certain elements by such solution analytical techniques as atomic absorption spectrometry (AAS), atomic emission spectrometry (ICP-AES), (see Test Method D1976), and inductively coupled plasma mass spectrometry (ICP-MS) (see Test Method D5673).  
1.1.1 Contents of aluminum, antimony, arsenic, barium, beryllium, bismuth, boron, cadmium, calcium, chromium, cobalt, copper, gallium, iron, lead, lithium, magnesium, manganese, mercury, molybdenum, nickel, phosphorus, potassium, scandium, selenium, silver, sodium, strontium, thallium, tin, titanium, vanadium and zinc can be extracted from ores and related metallurgical materials for determination by analytical methods for elements in solution. Other elements may be determined from extracts produced using this practice.  
1.1.2 Actual element quantification in digested solutions can be accomplished by following the various test methods under other appropriate ASTM standards for element(s) of interest in solution.  
1.1.3 The detection limit and linear content range for each element is dependent on the atomic absorption, mass spectrometry or emission spectrometric technique employed and may be found in the manual accompanying the instrument used or ASTM standard method for analysis of the solutions. Take into account the dilution factor in content calculations due to digestion and dilution of solid samples.  
1.1.4 The extent of extraction of elements from ores and related metallurgical materials by these practices is dependent upon the physical and mineralogical characteristics of the prepared sample and the digestion practice used.  
1.2 The digestion practices appear in the following order:    
Sections  
Nitric Acid Microwave Digestion  
7 to 14  
Four-Acid Total Digestion  
15 to 21.12  
1.3 The values stated SI units are to be regarded as the standard. No other units of measurements 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 and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see Section 11.

General Information

• Status: Historical
• Publication Date: 31-Oct-2014
• ICS: 73.060.01 - Metalliferous minerals in general
• Technical Committee: E01 - Analytical Chemistry for Metals, Ores, and Related Materials
• Drafting Committee: E01.02 - Ores, Concentrates, and Related Metallurgical Materials

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: E2941 − 14
Standard Practices for
Extraction of Elements from Ores and Related Metallurgical
1
Materials by Acid Digestion
This standard is issued under the fixed designation E2941; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
Sections
Nitric Acid Microwave Digestion 7 to 14
1.1 These practices cover the digestion of ores and related
Four-Acid Total Digestion 15 to 21.12
metallurgical materials, such as mine soil, waste rock and
1.3 The values stated SI units are to be regarded as the
tailings, for subsequent determination of acid-extractable con-
standard. No other units of measurements are included in this
tentsofcertainelementsbysuchsolutionanalyticaltechniques
standard.
as atomic absorption spectrometry (AAS), atomic emission
1.4 This standard does not purport to address all of the
spectrometry(ICP-AES),(seeTestMethodD1976),andinduc-
safety concerns, if any, associated with its use. It is the
tively coupled plasma mass spectrometry (ICP-MS) (see Test
responsibility of the user of this standard to establish appro-
Method D5673).
priate safety and health practices and determine the applica-
1.1.1 Contents of aluminum, antimony, arsenic, barium,
bility of regulatory limitations prior to use. For specific hazard
beryllium, bismuth, boron, cadmium, calcium, chromium,
statements, see Section 11.
cobalt, copper, gallium, iron, lead, lithium, magnesium,
manganese, mercury, molybdenum, nickel, phosphorus,
2. Referenced Documents
potassium, scandium, selenium, silver, sodium, strontium,
3
2.1 ASTM Standards:
thallium, tin, titanium, vanadium and zinc can be extracted
D1193Specification for Reagent Water
fromoresandrelatedmetallurgicalmaterialsfordetermination
D1976Test Method for Elements in Water by Inductively-
by analytical methods for elements in solution. Other elements
Coupled Argon Plasma Atomic Emission Spectroscopy
may be determined from extracts produced using this practice.
D5258Practice forAcid-Extraction of Elements from Sedi-
1.1.2 Actual element quantification in digested solutions
ments Using Closed Vessel Microwave Heating
can be accomplished by following the various test methods
D5673Test Method for Elements in Water by Inductively
under other appropriate ASTM standards for element(s) of
Coupled Plasma—Mass Spectrometry
interest in solution.
E50Practices for Apparatus, Reagents, and Safety Consid-
1.1.3 The detection limit and linear content range for each
erations for Chemical Analysis of Metals, Ores, and
elementisdependentontheatomicabsorption,massspectrom-
Related Materials
etryoremissionspectrometrictechniqueemployedandmaybe
E135Terminology Relating to Analytical Chemistry for
found in the manual accompanying the instrument used or
Metals, Ores, and Related Materials
ASTMstandardmethodforanalysisofthesolutions.Takeinto
E882Guide for Accountability and Quality Control in the
account the dilution factor in content calculations due to
Chemical Analysis Laboratory
digestion and dilution of solid samples.
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2.2 Federal Standard:
1.1.4 The extent of extraction of elements from ores and
CFR Title 21,Part 1030, and Title 47, Part 18
related metallurgical materials by these practices is dependent
upon the physical and mineralogical characteristics of the
3. Terminology
prepared sample and the digestion practice used.
3.1 Definitions—For definitions of terms used in these
1.2 The digestion practices appear in the following order:
practices, refer to Terminology E135.
1 3
This test method is under the jurisdiction of ASTM Committee E01 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Analytical Chemistry for Metals, Ores, and Related Materials and is the direct contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
responsibility of Subcommittee E01.02 on Ores, Concentrates, and Related Metal- Standards volume information, refer to the standard’s Document Summary page on
lurgical Materials. the ASTM website.
4
Current edition approved Nov. 1, 2014. Published January 2015. Originally AvailablefromU.S.GovernmentPrintingOfficeSuperintendentofDocuments,
approved in 2013. Last previous edition approved in 2013 as E2941-13. DOI: 732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http://
10.1520/E2941-14. www.access.gpo.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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E2941 − 14
4. Significance and Use 8. Significance and Use
4.1 These practices are primarily intended to test materials 8.1 Rapid hea
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This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: E2941 − 13 E2941 − 14
Standard PracticePractices for
Nitric Acid-Extraction Extraction of Elements from Ores and
Related Metallurgical Materials by Closed Vessel Microwave
1
HeatingAcid Digestion
This standard is issued under the fixed designation E2941; 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
1.1 This practice coversThese practices cover the digestion of ores and related metallurgical materials, such as mine soil, waste
rock and tailings, for subsequent determination of nitric acid-extractable contents of certain elements by such solution analytical
techniques as atomic absorption, absorption spectrometry (AAS), atomic emission spectrometry (ICP-AES), (see Test Method
D1976), and inductively coupled plasma mass spectroscopy spectrometry (ICP-MS) (see Test Method D5673).
1.1.1 Contents of aluminum, antimony, arsenic, barium, beryllium, bismuth, boron, cadmium, calcium, chromium, cobalt,
copper, gallium, iron, lead, lithium, magnesium, manganese, mercury, molybdenum, nickel, phosphorus, potassium, scandium,
selenium, silver, sodium, strontium, thallium, tin, titanium, vanadium and zinc can be extracted from ores and related metallurgical
materials for determination by analytical methods for elements in solution. Other elements may be determined from extracts
produced using this practice.
1.1.2 Actual element quantification in digested solutions can be accomplished by following the various test methods under other
appropriate ASTM standards for element(s) of interest in solution.
1.1.3 The detection limit and linear content range for each element is dependent on the atomic absorption absorption, mass
spectrometry or emission spectrometric technique employed and may be found in the manual accompanying the instrument used
or ASTM standard method for analysis of the solutions. Take into account the 100 fold dilution due to digesting a 1-g sample to
final volume of 100 mL.dilution factor in content calculations due to digestion and dilution of solid samples.
1.1.4 The extent of extraction of elements from ores and related metallurgical materials by this methodthese practices is
dependent upon the physical and mineralogical characteristics of the prepared sample.sample and the digestion practice used.
1.2 The digestion practices appear in the following order:
Sections
Nitric Acid Microwave Digestion 7 to 14
Four-Acid Total Digestion 15 to 21.12
1.3 The values stated SI units are to be regarded as the standard. No other units of measurements 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 and health practices and determine the applicability of regulatory
limitations prior to use. For specific hazard statements, see Section 911.
2. Referenced Documents
3
2.1 ASTM Standards:
D1193 Specification for Reagent Water
D1976 Test Method for Elements in Water by Inductively-Coupled Argon Plasma Atomic Emission Spectroscopy
D5258 Practice for Acid-Extraction of Elements from Sediments Using Closed Vessel Microwave Heating
D5673 Test Method for Elements in Water by Inductively Coupled Plasma—Mass Spectrometry
E50 Practices for Apparatus, Reagents, and Safety Considerations for Chemical Analysis of Metals, Ores, and Related Materials
E135 Terminology Relating to Analytical Chemistry for Metals, Ores, and Related Materials
1
This test method is under the jurisdiction of ASTM Committee E01 on Analytical Chemistry for Metals, Ores, and Related Materials and is the direct responsibility of
Subcommittee E01.02 on Ores, Concentrates, and Related Metallurgical Materials.
Current edition approved Oct. 1, 2013Nov. 1, 2014. Published October 2013January 2015. Originally approved in 2013. Last previous edition approved in 2013 as
E2941-13. DOI: 10.1520/E2941-13.10.1520/E2941-14.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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