Designation:D7572−15StandardGuideforRecoveryofAqueousCyanidesbyExtractionfromMineRockandSoil1ThisstandardisissuedunderthefixeddesignationD7572;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisguideisapplicableforthecollection,extraction,andpreservationofextractsfromminerockandsoilsamplesfortheanalysisofcyanideintheextracts.Responsibilitiesoffieldsamplingpersonnelandthelaboratoryareindicated.1.2Thesampling,preservation,andextractionproceduresdescribedinthisguidearerecommendedfortheanalysisoftotalcyanide,availablecyanide,weakaciddissociablecyanide,andfreecyanidebyTestMethodsD2036,D4282,D4374,D6888,D6994,D7237,andD7284.Theinformationsuppliedinthisguidecanalsobeappliedtootheranalyticalmethodsforcyanide,forexample,USEPAMethod335.4.1.3Theprocedureoptionsmethodsappearinthefollowingorder:ProcedureOptionSectionsOptionALaboratoryProcessingofFieldPreservedSamples11and12OptionBLaboratoryProcessingofMoistFieldSamples13and141.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D1129TerminologyRelatingtoWaterD1193SpecificationforReagentWaterD1293TestMethodsforpHofWaterD2036TestMethodsforCyanidesinWaterD3694PracticesforPreparationofSampleContainersandforPreservationofOrganicConstituentsD3856GuideforManagementSystemsinLaboratoriesEngagedinAnalysisofWaterD4282TestMethodforDeterminationofFreeCyanideinWaterandWastewaterbyMicrodiffusionD4374TestMethodsforCyanidesinWater—AutomatedMethodsforTotalCyanide,WeakAcidDissociableCyanide,andThiocya...
