ASTM_D_7572_-_15.pdf

Designation:D757215Standard Guide forRecovery of Aqueous Cyanides by Extraction from MineRock and Soil1This standard is issued under the fixed designation D7572;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.Scope*1.1 This guide is applicable for the collection,extraction,and preservation of extracts from mine rock and soil samplesfor the analysis of cyanide in the extracts.Responsibilities offield sampling personnel and the laboratory are indicated.1.2 The sampling,preservation,and extraction proceduresdescribed in this guide are recommended for the analysis oftotal cyanide,available cyanide,weak acid dissociablecyanide,and free cyanide by Test Methods D2036,D4282,D4374,D6888,D6994,D7237,and D7284.The informationsupplied in this guide can also be applied to other analyticalmethods for cyanide,for example,US EPA Method 335.4.1.3 The procedure options methods appear in the followingorder:Procedure OptionSectionsOption ALaboratory Processing of FieldPreserved Samples11 and 12Option BLaboratory Processing of MoistField Samples13 and 141.4 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.5 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.2.Referenced Documents2.1 ASTM Standards:2D1129 Terminology Relating to WaterD1193 Specification for Reagent WaterD1293 Test Methods for pH of WaterD2036 Test Methods for Cyanides in WaterD3694 Practices for Preparation of Sample Containers andfor Preservation of Organic ConstituentsD3856 Guide for Management Systems in LaboratoriesEngaged in Analysis of WaterD4282 Test Method for Determination of Free Cyanide inWater and Wastewater by MicrodiffusionD4374 Test Methods for Cyanides in WaterAutomatedMethods for Total Cyanide,Weak Acid DissociableCyanide,and Thiocyanate(Withdrawn 2012)3D4840 Guide for Sample Chain-of-Custody ProceduresD4841 Practice for Estimation of Holding Time for WaterSamples Containing Organic and Inorganic ConstituentsD5847 Practice for Writing Quality Control Specificationsfor Standard Test Methods for Water AnalysisD6696 Guide for Understanding Cyanide SpeciesD6888 Test Method for Available Cyanide with LigandDisplacement and Flow InjectionAnalysis(FIA)UtilizingGas Diffusion Separation and Amperometric DetectionD6994 Test Method for Determination of Metal CyanideComplexes in Wastewater,Surface Water,Groundwaterand Drinking Water Using Anion Exchange Chromatog-raphy with UV DetectionD7237 Test Method for Free Cyanide with Flow InjectionAnalysis(FIA)Utilizing Gas Diffusion Separation andAmperometric DetectionD7284 Test Method for Total Cyanide in Water by MicroDistillation followed by Flow Injection Analysis with GasDiffusion Separation and Amperometric DetectionD7365 Practice for Sampling,Preservation and MitigatingInterferences in Water Samples for Analysis of CyanideD7511 Test Method for Total Cyanide by Segmented FlowInjection Analysis,In-Line Ultraviolet Digestion and Am-perometric Detection1This guide is under the jurisdiction of ASTM Committee D19 on Water and isthe direct responsibility of Subcommittee D19.06 on Methods for Analysis forOrganic Substances in Water.Current edition approved Feb.1,2015.Published February 2015.Originallyapproved in 2009.Last previous edition published 2013 as D7572 13.DOI:10.1520/D7572-15.2For 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.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 2.2 U.S.EPA Methods:4EPA OIA-1677 Available Cyanide in WaterEPA Method 335.2 Cyanide,Total(Titrimetric;Spectropho-tometric)EPA Method 335.4 Determination of Total Cyanide bySemi-Automated Colorimetry3.Terminology3.1 DefinitionsFor definitions of terms used in this guide,refer to Terminology D1129 and Guide D6696.3.2 Definitions of Terms Specific to This Standard:3.2.1 mine rock,nore,waste rock or overburden exca-vated in order to construct an ore-processing site,or recovermetals or minerals during mining operations;or coarse pro-cessed ore such as heap-leach spoils.3.2.2 nominal size,nin sampling,for a screen of thestandard series,the opening that would pass 95%of arepresentative sample.3.2.3 refrigeration,nstoring