【英文标准名称】:StandardTestMethodsforCyanidesinWater-AutomatedMethodsforTotalCyanide,WeakAcidDissociableCyanide,andThiocyanate
【原文标准名称】:水中氰化物测定的标准试验方法.总氰化物、弱酸分解氰化物和硫氰化物自动测定法
【标准号】:ASTMD4374-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D19.06
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:氰化物;含量测定;试验;水
【英文主题词】:automatedmethods;cyanide;thiocyanate;wastewater;weakaciddissociable
【摘要】:Cyanidesareknowntobetoxictoman,butmoresotofishandotheraquaticlife.Thecomplexityofthechemistryofcyanideshasledtothecoexistenceofseveralcyanidespeciesintheenvironment.Thepresenceofcyanidesinindustrial,domestic,andsurfacewateriscauseforconcern.Severalregulationsandstandardsrequirecontinuousmonitoringofcyanidesindifferenttypesofwaterandwastes.Theautomatedtestmethodspresentedofferusefultoolsforsuchmonitoring.(SeealsoPracticeD4193.)1.1Thesetestmethodscoverthedeterminationofdifferentspeciesofcyanidesandthiocyanateinwaterandwastewater,namelyweakaciddissociablecyanide,totalcyanide,andthiocyanate().1.1.1TotalCyanideThistestmethoddeterminesalltheweakaciddissociablecyanidesandthestrongmetal-cyano-complexes,suchasferrocyanide[Fe(CN)6]4,ferricyanide[Fe(CN)6]3,hexacyanocolbaltate[Co(CN)6]3,andthoseofgoldandplatinum.1.1.2WeakAcidDissociableCyanideThistestmethodbasicallydeterminesfreecyanides,asCNandHCN,andweakmetal-cyano-complexessuchas[Cd(CN)4]2and[Mn(CN)6]3.Ironcomplexesarenotincluded.1.1.3Strongcyanidecomplexes,likethoseofiron,cobalt,etc.,canbedeterminedbydifference,thatis,cyanidecomplexes=totalcyanidesweakaciddissociablecyanides.1.1.4ThiocyanateThistestmethoddeterminesthethiocyanateasthedifferencebetweenanothermeasurementthatincludestotalcyanideplusthiocyanateandthevalueoftotalcyanide,thatis,thiocyanate=totalcyanideplusthiocyanatetotalcyanide.1.2Cyanatesandcyanogenhalidesarenotdetected.CyanogenchloridehydrolyzestocyanateatthepHofsamplepreservation(12).1.3Mostoftheorgano-cyano-complexesarenotmeasured,withtheexceptionoftheweakcyanohydrins.1.4Thesetestmethodsapplytodifferenttypesofwater,wastewater(rawsewage,sludge,andeffluent),sludge,someindustrialwaste,andsediments.Samplematrixesshouldbeevaluatedbytheuser.Thereportedprecisionandbias(seeSection)maynotapplytoallsamples.1.5ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecificprecautionarystatements,seeSection9.
【中国标准分类号】:Z16
【国际标准分类号】:13_060_50
【页数】:15P.;A4
【正文语种】: