ASTM E2941-21
(Practice)Standard Practices for Extraction of Elements from Ores and Related Metallurgical Materials by Acid Digestion
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), inductively coupled plasma 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. Consider 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
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see Sections 11 and 20.
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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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: E2941 − 21
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
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), inductively coupled
1.4 This standard does not purport to address all of the
plasma atomic emission spectrometry (ICP-AES) (see Test
safety concerns, if any, associated with its use. It is the
Method D1976), and inductively coupled plasma mass spec-
responsibility of the user of this standard to establish appro-
trometry (ICP-MS) (see Test Method D5673).
priate safety, health, and environmental practices and deter-
1.1.1 Contents of aluminum, antimony, arsenic, barium,
mine the applicability of regulatory limitations prior to use.
beryllium, bismuth, boron, cadmium, calcium, chromium,
For specific hazard statements, see Sections 11 and 20.
cobalt, copper, gallium, iron, lead, lithium, magnesium,
1.5 This international standard was developed in accor-
manganese, mercury, molybdenum, nickel, phosphorus,
dance with internationally recognized principles on standard-
potassium, scandium, selenium, silver, sodium, strontium,
ization established in the Decision on Principles for the
thallium, tin, titanium, vanadium and zinc can be extracted
Development of International Standards, Guides and Recom-
fromoresandrelatedmetallurgicalmaterialsfordetermination
mendations issued by the World Trade Organization Technical
by analytical methods for elements in solution. Other elements
Barriers to Trade (TBT) Committee.
may be determined from extracts produced using this practice.
1.1.2 Actual element quantification in digested solutions
2. Referenced Documents
can be accomplished by following the various test methods
2
2.1 ASTM Standards:
under other appropriate ASTM standards for element(s) of
D1193Specification for Reagent Water
interest in solution.
D1976Test Method for Elements in Water by Inductively-
1.1.3 The detection limit and linear content range for each
Coupled Plasma Atomic Emission Spectroscopy
elementisdependentontheatomicabsorption,massspectrom-
D5258Practice forAcid-Extraction of Elements from Sedi-
etryoremissionspectrometrictechniqueemployedandmaybe
ments Using Closed Vessel Microwave Heating
found in the manual accompanying the instrument used or
D5673Test Method for Elements in Water by Inductively
ASTM standard method for analysis of the solutions. Consider
Coupled Plasma—Mass Spectrometry
the dilution factor in content calculations due to digestion and
E50Practices for Apparatus, Reagents, and Safety Consid-
dilution of solid samples.
erations for Chemical Analysis of Metals, Ores, and
1.1.4 The extent of extraction of elements from ores and
Related Materials
related metallurgical materials by these practices is dependent
E135Terminology Relating to Analytical Chemistry for
upon the physical and mineralogical characteristics of the
Metals, Ores, and Related Materials
prepared sample and the digestion practice used.
E882Guide for Accountability and Quality Control in the
1.2 The digestion practices appear in the following order:
Chemical Analysis Laboratory
1
These practices are under the jurisdiction of ASTM Committee E01 on
Analytical Chemistry for Metals, Ores, and Related Materials and are the direct
responsibility of Subcommittee E01.02 on Ores, Concentrates, and Related Metal-
2
lurgical Materials. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Oct. 1, 2021. Published October 2021. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 2013. Last previous edition approved in 2014 as E2941–14. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/E2941-21. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United
...
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 − 14 E2941 − 21
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. 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 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), inductively coupled plasma atomic emission spectrometry (ICP-AES),(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 Consider 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
Four-Acid Total Digestion 15 to 21
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
This test method is These practices are under the jurisdiction of ASTM Committee E01 on Analytical Chemistry for Metals, Ores, and Related Materials and isare the
direct responsibility of Subcommittee E01.02 on Ores, Concentrates, and Related Metallurgical Materials.
Current edition approved Nov. 1, 2014Oct. 1, 2021. Published January 2015October 2021. Originally approved in 2013. Last previous edition approved in 20132014 as
E2941E2941 – 14.-13. DOI: 10.1520/E2941-14.10.1520/E2941-21.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
E2941 − 21
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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use. For specific hazard statements, see SectionSections 11 and 20.
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.
2. Referenced Documents
2
2.1 ASTM Standards:
D1193 Specification for Reagent Water
D1976 Test Method for Elements in Water by Inductively-Coupled 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 t
...
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