ASTM_D_4165_-_06_2012.pdf

Designation:D416506(Reapproved 2012)Standard Test Method forCyanogen Chloride in Water1This standard is issued under the fixed designation D4165;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 This test method covers the determination of cyanogenchloride in water.Cyanogen chloride is normally present onlyat very low concentrations;it is a very labile and sparselysoluble gaseous compound.Water samples may contain cya-nogen chloride after the chlorination of waste waters contain-ing cyanide or thiocyanate compounds.1.2 Cyanogen chloride is unstable.A quick test using a spotplate or comparator as soon as the sample is collected may bethe best test,reducing the loss of cyanogen chloride during thetime lapse between sampling and analysis.(See Fig.1 for atypical decay curve for cyanogen chloride in a solution.)1.3 This test method has been used successfully withreagent water.The analyst is responsible for determiningwhether the test method is applicable to the water matrix beingtested.Reference is made to Test Method D of Test MethodsD2036 which is based on similar chemical reactions and hasbeen evaluated by collaborative testing in this matrix.1.4 The lower limit of detectability is 0.005 mg CN/L.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.Specific hazardstatements are given in Note 1and Note 2and Section 9.2.Referenced Documents2.1 ASTM Standards:2D1129 Terminology Relating to WaterD1193 Specification for Reagent WaterD2036 Test Methods for Cyanides in WaterD3370 Practices for Sampling Water from Closed ConduitsD3856 Guide for Management Systems in LaboratoriesEngaged in Analysis of WaterD4210 Practice for Intralaboratory Quality Control Proce-dures and a Discussion on Reporting Low-Level Data(Withdrawn 2002)3D5789 Practice for Writing Quality Control Specificationsfor Standard Test Methods for Organic Constituents(Withdrawn 2002)3D5847 Practice for Writing Quality Control Specificationsfor Standard Test Methods for Water AnalysisE60 Practice for Analysis of Metals,Ores,and RelatedMaterials by SpectrophotometryE275 Practice for Describing and Measuring Performance ofUltraviolet and Visible Spectrophotometers3.Terminology3.1 DefinitionsFor definitions of terms used in this testmethod,refer to Terminology D1129.4.Summary of Test Method4.1 The water sample is mixed with a pyridine-barbituricacid solution and the color produced is measured with aspectrophotometer.5.Significance and Use5.1 The presence of cyanogen chloride in chlorinated sani-tary and industrial effluents and therefore receiving waters is ofconcern because of its toxicity to aquatic life.5.2 This test method provides an analytical procedure formeasuring cyanogen chloride in water.5.3 This test method is applicable for clean metal finishingand chlorinated sanitary and industrial effluents,and also canbe used to establish process control of cyanide destruction bychlorination in waste water treatment facilities.6.Interferences6.1 Color and turbidity can interfere.7.Apparatus7.1 Spectrophotometer or Filter Photometer,suitable formeasurement in the region of 578 nm,using 1.0-cm absorption1This test method is under the jurisdiction of ASTM Committee D19 on Waterand is the direct responsibility of Subcommittee D19.06 on Methods forAnalysis forOrganic Substances in Water.Current edition approved June 15,2012.Published August 2012.Originallyapproved in 1982.Last previous edition approved in 2006 as D4165 06 DOI:10.1520/D4165-06R12.2For 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 cells.Filter photometers and photometric practices used in thistest method shall conform to Practice E60.Spectrophotometersshall conform to Practice E275.8.Reagents8.1 Purity of ReagentsReagent grade chemicals shall beused in all tests.Unless otherwise indicated,it is intended thatall reagents shall conform to the specifications of the Commit-tee onAnalytical Reagents of theAmerican Chem-ical Society,where such specifications are available.4Other grades may beused,provided it is first ascertained that the reagent is ofsufficiently high purity to permit its use without lessening theaccuracy of the determination.8.2 Purity of Wat