基本信息
| 标准名称： | 稀土金属及其氧化物化学分析方法 硫氰酸汞-硝酸铁分光光度法测定氯量 |
| 英文名称： | Rare-earth metal oxides-Determinaiton of chlorine content -Mercury sulphoeyanie-iron nitrate spectrophotometric method |
| 中标分类： |
冶金 >>
金属化学分析方法 >>
稀有金属及其合金分析方法 |
| ICS分类： |
冶金 >>
有色金属 >>
镉、钴及其合金
|
| 替代情况： | YB 1509-1977;被GB/T 12690.9-2003代替 |
| 发布日期： | 1990-01-02 |
| 实施日期： | 1992-01-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 2004-06-01 |
| 出版日期： | 1900-01-01 |
| 页数： | 3页 |
适用范围
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前言
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目录
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引用标准
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所属分类： 冶金 金属化学分析方法 稀有金属及其合金分析方法 冶金 有色金属 镉 钴及其合金
【英文标准名称】:StandardTestMethodforTotalCarbon,InorganicCarbon,andOrganicCarboninWaterbyUltraviolet,PersulfateOxidation,andMembraneConductivityDetection
【原文标准名称】:用紫外线、过硫酸盐氧化物和薄膜导电率检测法测定水中总含碳量、有机碳和无机碳的标准试验方法
【标准号】:ASTMD5904-2002
【标准状态】:现行
【国别】:
【发布日期】:2002
【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】:分析方法;试验;碳含量;水质
【英文主题词】:carbon;carbon-dioxide;inorganic-carbon;low-temperature-oxidation;membrane-conductivity-detection;organiccarbon;totalcarbon
【摘要】:Thistestmethodisusedfordeterminationofthecarboncontentofwaterfromavarietyofnatural,domestic,andindustrialsources.Initsmostcommonform,thistestmethodisusedtomeasureorganiccarbonasameansofmonitoringorganicpollutantsinhighpurityanddrinkingwater.Thesemeasurementsarealsousedinmonitoringwastetreatmentprocesses.TherelationshipofTOCtootherwaterqualityparameterssuchaschemicaloxygendemand(COD)andtotaloxygendemand(TOD)isdescribedintheliterature.51.1Thistestmethodcoversthedeterminationoftotalcarbon(TC),inorganiccarbon(IC),andtotalorganiccarbon(TOC)inwaterintherangefrom0.5to30mg/Lofcarbon.Higherlevelsmaybedeterminedbysampledilution.Thetestmethodutilizesultraviolet-persulfateoxidationoforganiccarbon,coupledwithaCO2selectivemembranetorecovertheCO2intodeionizedwater.Thechangeinconductivityofthedeionizedwaterismeasuredandrelatedtocarbonconcentrationintheoxidizedsample.Inorganiccarbonisdeterminedinasimilarmannerwithouttherequirementforoxidation.Inbothcases,thesampleisacidifiedtofacilitateCO2recoverythroughthemembrane.TherelationshipbetweentheconductivitymeasurementandcarbonconcentrationisdescribedbyasetofchemometricequationsforthechemicalequilibriumofCO2,HCO3-,H+,andtherelationshipbetweentheionicconcentrationsandtheconductivity.Thechemometricmodelincludesthetemperaturedependenceoftheequilibriumconstantsandthespecificconductances.1.2Thistestmethodhastheadvantageofaveryhighsensitivitydetectorthatallowsverylowdetectionlevelsonrelativelysmallvolumesofsample.Also,useoftwomeasurementchannelsallowsdeterminationofCO2inthesampleindependentlyoforganiccarbon.IsolationoftheconductivitydetectorfromthesamplebytheCO2selectivemembraneresultsinaverystablecalibration,withminimalinterferences.1.3Thistestmethodwasusedsuccessfullywithreagentwaterspikedwithsodiumbicarbonateandvariousorganicmaterials.Itistheuser'sresponsibilitytoensurethevalidityofthistestmethodforwatersofuntestedmatrices.1.4Thistestmethodisapplicableonlytocarbonaceousmatterinthesamplethatcanbeintroducedintothereactionzone.Theinjectoropeningsizegenerallylimitsthemaximumsizeofparticlesthatcanbeintroduced.1.5Inadditiontolaboratoryanalyses,thistestmethodmaybeappliedtoonlinemonitoring.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,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】: