ASTM D7284-2008 利用气体扩散分离和安培检测法对微蒸馏后水样中总氰化物的流量注入分析(FIA)的标准试验方法

作者:标准资料网 时间:2024-05-08 12:29:03  浏览:9189   来源:标准资料网

【英文标准名称】:StandardTestMethodforTotalCyanideinWaterbyMicroDistillationfollowedbyFlowInjectionAnalysiswithGasDiffusionSeparationandAmperometricDetection
【原文标准名称】:利用气体扩散分离和安培检测法对微蒸馏后水样中总氰化物的流量注入分析(FIA)的标准试验方法
【标准号】:ASTMD7284-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:
【英文主题词】:amperometry;cyanide;distillation;flowinjectionanalysis;gasdiffusionmembrane;totalcyanide
【摘要】:Cyanideandhydrogencyanidearehighlytoxic.Regulationshavebeenestablishedtorequirethemonitoringofcyanideinindustrialanddomesticwastesandsurfacewaters.Thistestmethodisapplicablefornaturalwaters,industrialwastewatersandeffluents.1.1Thistestmethodisusedtodeterminetheconcentrationoftotalcyanideinanaqueouswastewateroreffluent.Themethoddetectsthecyanidesthatarefree(HCNandCN-)andstrong-metal-cyanidecomplexesthatdissociateandreleasefreecyanidewhenrefluxedunderstronglyacidicconditions.1.2Thismethodmaynotbeapplicabletoprocesssolutionsfrompreciousmetalsminingoperations.1.3Thisprocedureisapplicableoverarangeofapproximately2to400x03BC;g/L(partsperbillion)totalcyanide.Higherconcentrationscanbemeasuredwithsampledilutionorlowerinjectionvolume.1.4ThedeterminativestepofthismethodutilizesflowinjectionwithamperometricdetectionbasedonTestMethodD6888.Priortoanalysis,samplesmustbedistilledwithamicro-distillationapparatusdescribedinthistestmethodorwithasuitablecyanidedistillationapparatusspecifiedinTestMethodsD2036.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SpecifichazardstatementsaregiveninNote2andSection9.
【中国标准分类号】:Z16
【国际标准分类号】:13_060_50
【页数】:6P.;A4
【正文语种】:英语