ASTM_E_2941_-_14.pdf

Designation:E294114Standard Practices forExtraction of Elements from Ores and Related MetallurgicalMaterials by Acid Digestion1This standard is issued under the fixed designation E2941;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 These practices cover the digestion of ores and relatedmetallurgical materials,such as mine soil,waste rock andtailings,for subsequent determination of acid-extractable con-tents of certain elements by such solution analytical techniquesas atomic absorption spectrometry(AAS),atomic emissionspectrometry(ICP-AES),(see Test Method D1976),and induc-tively coupled plasma mass spectrometry(ICP-MS)(see TestMethod 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 extractedfrom ores and related metallurgical materials for determinationby analytical methods for elements in solution.Other elementsmay be determined from extracts produced using this practice.1.1.2 Actual element quantification in digested solutionscan be accomplished by following the various test methodsunder other appropriate ASTM standards for element(s)ofinterest in solution.1.1.3 The detection limit and linear content range for eachelement is dependent on the atomic absorption,mass spectrom-etry or emission spectrometric technique employed and may befound in the manual accompanying the instrument used orASTM standard method for analysis of the solutions.Take intoaccount the dilution factor in content calculations due todigestion and dilution of solid samples.1.1.4 The extent of extraction of elements from ores andrelated metallurgical materials by these practices is dependentupon the physical and mineralogical characteristics of theprepared sample and the digestion practice used.1.2 The digestion practices appear in the following order:SectionsNitric Acid Microwave Digestion7 to 14Four-Acid Total Digestion15 to 21.121.3 The values stated SI units are to be regarded as thestandard.No other units of measurements are included in thisstandard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.For specific hazardstatements,see Section 11.2.Referenced Documents2.1 ASTM Standards:3D1193 Specification for Reagent WaterD1976 Test Method for Elements in Water by Inductively-Coupled Argon Plasma Atomic Emission SpectroscopyD5258 Practice for Acid-Extraction of Elements from Sedi-ments Using Closed Vessel Microwave HeatingD5673 Test Method for Elements in Water by InductivelyCoupled PlasmaMass SpectrometryE50 Practices for Apparatus,Reagents,and Safety Consid-erations for Chemical Analysis of Metals,Ores,andRelated MaterialsE135 Terminology Relating to Analytical Chemistry forMetals,Ores,and Related MaterialsE882 Guide for Accountability and Quality Control in theChemical Analysis Laboratory2.2 Federal Standard:4CFR Title 21,Part 1030,and Title 47,Part 183.Terminology3.1 DefinitionsFor definitions of terms used in thesepractices,refer to Terminology E135.1This test method is under the jurisdiction of ASTM Committee E01 onAnalytical Chemistry for Metals,Ores,and Related Materials and is the directresponsibility of Subcommittee E01.02 on Ores,Concentrates,and Related Metal-lurgical Materials.Current edition approved Nov.1,2014.Published January 2015.Originallyapproved in 2013.Last previous edition approved in 2013 as E2941-13.DOI:10.1520/E2941-14.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.4Available from U.S.Government Printing Office Superintendent of Documents,732 N.Capitol St.,NW,Mail Stop:SDE,Washington,DC 20401,http:/www.access.gpo.gov.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.Significance and Use4.1 These practices are primarily intended to test materialsfor compliance with compositional specifications and formonitoring.Partial extraction of ores and related metallurgicalmaterials can provide information on the availability of ele-ments to leaching,water quality changes,or other site condi-tions.4.2 It is assumed that the users of these practices will betrained analysts capable of performing common laboratoryprocedures skillfully and safely.It is