ASTM E2941-21
Standard Practices for Extraction of Elements from Ores and Related Metallurgical Materials by Acid Digestion

Standard No.

ASTM E2941-21

Release Date

2021

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM E2941-21

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.

ASTM E2941-21 Referenced Document

• ASTM D1193 Standard Specification for Reagent Water
• ASTM D1976 Standard Test Method for Elements in Water by Inductively-Coupled Argon Plasma Atomic Emission Spectroscopy
• ASTM D5258 Standard Practice for Acid-Extraction of Elements from Sediments Using Closed Vessel Microwave Heating
• ASTM D5673 Standard Test Method for Elements in Water by Inductively Coupled Plasma8212;Mass Spectrometry
• ASTM E135 Standard Terminology Relating to Analytical Chemistry for Metals, Ores, and Related Materials
• ASTM E50 Standard Practice for Apparatus, Reagents, and safety Precautions for Chemical Analysis of Metals
• ASTM E882 Standard Guide for Accountability and Quality Control in the Chemical Analysis Laboratory

ASTM E2941-21 history

• 2021 ASTM E2941-21 Standard Practices for Extraction of Elements from Ores and Related Metallurgical Materials by Acid Digestion
• 2014 ASTM E2941-14 Standard Practices for Extraction of Elements from Ores and Related Metallurgical Materials by Acid Digestion
• 2013 ASTM E2941-13 Standard Practice for Nitric Acid-Extraction of Elements from Ores and Related Metallurgical Materials by Closed Vessel Microwave Heating