【英文标准名称】:StandardTestMethodforLowLevelDeterminationofTotalCarbon,InorganicCarbonandOrganicCarboninWaterbyUltraviolet,PersulfateOxidation,andMembraneConductivityDetection
【原文标准名称】:通过紫外线,过硫酸盐氧化,和膜导检测对水中总碳,有机碳,无机碳低水平测定的标准试验方法
【标准号】:ASTMD6317-1998(2004)
【标准状态】:现行
【国别】:
【发布日期】:1998
【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】:D19.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:有机碳;碳;高纯度水;无机碳;低温氧化;膜导探测;总碳;二氧化碳
【英文主题词】:carbon;carbondioxide;high-puritywater;inorganiccarbon;lowtemperatureoxidation;membraneconductivitydetection;organiccarbon;totalcarbon
【摘要】:Thistestmethodisusedfordeterminationofthecarboncontentofwaterfromavarietyofnatural,domestic,andindustrialsources.Initsmostcommonform,thistestmethodisusedtomeasureorganiccarbonasameansofmonitoringorganicimpuritiesinhighpurityprocesswaterusedinindustriessuchasnuclearpower,pharmaceutical,andelectronics.1.1Thistestmethodcoversthedeterminationoftotalcarbon(TC),inorganiccarbon(IC),andtotalorganiccarbon(TOC)inwaterintherangefrom10to1000g/Lofcarbon.ThismethodisforlaboratoryorgrabsampleapplicationsandhasbeensubjectedtoaninterlaboratorystudyundertheguidelinesofD2777.TestMethodD5997canbeusedforon-linedeterminations.Thetestmethodutilizespersulfateorultravioletoxidationoforganiccarbon,orbothcoupledwithaCO2selectivemembranetorecovertheCO2intodeionizedwater.Thechangeinconductivityofthedeionizedwaterismeasuredandrelatedtocarbonconcentrationintheoxidizedsample.Inorganiccarbonisdeterminedinasimilarmannerwithouttheoxidationstep.Inbothcases,thesampleisacidifiedtofacilitateCO2recoverythroughthemembrane.TherelationshipbetweentheconductivitymeasurementandcarbonconcentrationisdescribedbyasetofchemometricequationsforthechemicalequilibriumofCO2,HCO3-,andH+,andtherelationshipbetweentheionicconcentrationsandtheconductivity.ThechemometricmodelincludesthetemperaturedependenceoftheequilibriumconstantsandthespecificconductancesresultinginlinearresponseofthemethodoverthestatedrangeofTOC.SeeTestMethodD4519foradiscussionofthemeasurementofCO2byconductivity.1.2Thistestmethodhastheadvantageofaveryhighsensitivitydetectorthatallowsverylowdetectionlevelsonrelativelysmallvolumesofsample.Also,useoftwomeasurementchannelsallowsdeterminationofCO2inthesampleindependentlyoforganiccarbon.IsolationoftheconductivitydetectorfromthesamplebytheCO2selectivemembraneresultsinaverystablecalibration,withminimalinterferences.1.3Thistestmethodwasusedsuccessfullywithreagentwaterspikedwithvariousorganicmaterials.Itistheuser'sresponsibilitytoensurethevalidityofthistestmethodforwatersofuntestedmatrices.1.4Inadditiontolaboratoryanalyses,thistestmethodmaybeadaptedtoonlinemonitoring.SeeTestMethodD5997.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Z16
【国际标准分类号】:13_060_50
【页数】:7P.;A4
【正文语种】: