ASTM_E_1600_-_15.pdf

Designation:E160015Standard Test Methods forDetermination of Gold in Cyanide Solutions1This standard is issued under the fixed designation E1600;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 test methods cover the determination of gold inore processing cyanide solutions within the following ranges:MethodApplication Range,g/mLInductively Coupled Plasma Mass Spectrometry0.001 to 0.500Flame Atomic Absorption Spectrometry0.300 to 10.0NOTE1The lower limit for the Inductively Coupled Plasma MassSpectrometry Method,0.001 g/mL,was set following the guidance ofPractice E1601.The reproducibility Index,R,was calculated using thetotal standard deviation for the lowest concentration Youden pair solution.1.1.1 These test methods may also be applied to cyanideleach solutions from metallurgical evaluation procedures.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.3 The test methods appear in the following order:MethodSectionsFlame Atomic Absorption Spectrometry9 16Inductively Coupled Plasma Mass Spectrometry17 241.4 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.Specific precau-tions are given in 11.1,11.1.1,11.5,and 12.2.2.Referenced Documents2.1 ASTM Standards:2D1193 Specification for Reagent WaterD1293 Test Methods for pH of WaterD2777 Practice for Determination of Precision and Bias ofApplicable Test Methods of Committee D19 on WaterD5673 Test Method for Elements in Water by InductivelyCoupled PlasmaMass SpectrometryD6888 Test Method for Available Cyanide with LigandDisplacement and Flow InjectionAnalysis(FIA)UtilizingGas Diffusion Separation and Amperometric DetectionD7237 Test Method for Free Cyanide with Flow InjectionAnalysis(FIA)Utilizing Gas Diffusion Separation andAmperometric DetectionE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE50 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 MaterialsE173 Practice for Conducting Interlaboratory Studies ofMethods for Chemical Analysis of Metals(Withdrawn1998)3E882 Guide for Accountability and Quality Control in theChemical Analysis LaboratoryE1060 Practice for Interlaboratory Testing of Spectrochemi-cal Methods of Analysis(Withdrawn 1997)3E1601 Practice for Conducting an Interlaboratory Study toEvaluate the Performance of an Analytical Method3.Terminology3.1 DefinitionsFor definitions of terms used in these testmethods,refer to Terminology E135.4.Significance and Use4.1 In primary metallurgical processes for gold bearing ores,gold is extracted with an alkaline cyanide solution.Metallur-gical accounting,process control,and ore evaluation proce-dures depend on accurate,precise,and prompt measurementsof the gold concentrations.4.2 These test methods are comparative referee methods forcompliance with compositional specifications for metal con-centration or to monitor processes.It is assumed that all whouse these methods will be trained analysts capable of perform-ing common laboratory procedures skillfully and safely.It is1These test methods are under the jurisdiction of ASTM Committee E01 onAnalytical Chemistry for Metals,Ores,and Related Materials and are the directresponsibility of Subcommittee E01.02 on Ores,Concentrates,and Related Metal-lurgical Materials.Current edition approved April 1,2015.Published May 2015.Originallyapproved in 1994.Last previous edition approved in 2013 as E1600 13.DOI:10.1520/E1600-15.2For 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.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 expected that work will be performed in a properly equippedlaboratory under appropriate quality control practices such asthose described in Guide E882,and that proper waste disposalprocedures will be followed.5.Hazards5.1 For precautions to be observed in these methods,refer toPractice E50.5.2 Hydrogen cyanide and alkali cyanide are very toxicsubstances.Use an efficient fume hood.Cyanide must bedisposed of with care,avoiding contact with acid that releaseshydrogen cyanide gas.Oxidation of cya