ISO 15705-2002 水质.化学需氧量的测定(ST-COD).小型密封管法
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【英文标准名称】:Waterquality-Determinationofthechemicaloxygendemandindex(ST-COD)-Small-scalesealed-tubemethod
【原文标准名称】:水质.化学需氧量的测定(ST-COD).小型密封管法
【标准号】:ISO15705-2002
【标准状态】:现行
【国别】:国际
【发布日期】:2002-11
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC147
【标准类型】:()
【标准水平】:()
【中文主题词】:试验;水常规;水;标准方法;需氧量;测定;污水;水质;化学分析和试验;定义;质量;抽样方法;化学需氧量;容器(玻璃);含量测定
【英文主题词】:Cells(glass);Chemicalanalysisandtesting;Chemicaloxygendemand;Definitions;Determination;Determinationofcontent;Oxygendemand;Quality;Samplingmethods;Sewage;Standardmethods;Testing;Water;Waterpractice;Waterquality
【摘要】:ThisInternationalStandardspecifiesamethodforthedeterminationofthechemicaloxygendemand(ST-COD)usingthesealedtubemethod.Thetestisempiricalandisapplicabletoanyaqueoussample,whichincludesallsewageandwastewaters.ThemethodisapplicabletoundilutedsampleshavingST-CODvaluesupto1000mg/landachlorideconcentrationnotexceeding1000mg/l.SampleswithhigherST-CODvaluesrequirepredilution.ForsampleswithalowCOD,theprecisionofthemeasurementwillbereducedandthedetectionlimitwillbepoorer.Sampleswithahighchlorideconcentrationwillneedtobepredilutedtogiveachlorideconcentrationofapproximately1000mg/lorlessbeforeanalysis.Themethodoxidizesalmostalltypesoforganiccompoundsandmostinorganicreducingagents.Ithasadetectionlimit(4,65timesthewithin-batchstandarddeviationofablankorverylowstandard)of6mg/lforphotometricdetectionat600nm,and15mg/lfortitrimetricdetectionasreportedbyonelaboratorycomparingthephotometricandtitrimetrictechniquesusingacommercialtestkitwitharangeupto1000mg/l.ThetitrimetricpartofthisInternationalStandardisapplicabletosamplesexhibitinganatypicalcolourorturbidityafterthedigestionstage.NOTEAcomparisonbetweenthefull-scalemethod(ISO6060)andthemethodofthisInternationalStandardisgiveninannexA.AdiscussionofpossiblehazardsisgiveninannexB.Informationoncommercialsmall-scaletestkitsisgiveninannexC.Themethodcanbeusedoverareducedrange(seeannexesDandE).Forcheckingthechlorideconcentration,seeannexF.
【中国标准分类号】:Z16
【国际标准分类号】:13_060_50
【页数】:18P.;A4
【正文语种】:英语
【原文标准名称】:水质.化学需氧量的测定(ST-COD).小型密封管法
【标准号】:ISO15705-2002
【标准状态】:现行
【国别】:国际
【发布日期】:2002-11
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC147
【标准类型】:()
【标准水平】:()
【中文主题词】:试验;水常规;水;标准方法;需氧量;测定;污水;水质;化学分析和试验;定义;质量;抽样方法;化学需氧量;容器(玻璃);含量测定
【英文主题词】:Cells(glass);Chemicalanalysisandtesting;Chemicaloxygendemand;Definitions;Determination;Determinationofcontent;Oxygendemand;Quality;Samplingmethods;Sewage;Standardmethods;Testing;Water;Waterpractice;Waterquality
【摘要】:ThisInternationalStandardspecifiesamethodforthedeterminationofthechemicaloxygendemand(ST-COD)usingthesealedtubemethod.Thetestisempiricalandisapplicabletoanyaqueoussample,whichincludesallsewageandwastewaters.ThemethodisapplicabletoundilutedsampleshavingST-CODvaluesupto1000mg/landachlorideconcentrationnotexceeding1000mg/l.SampleswithhigherST-CODvaluesrequirepredilution.ForsampleswithalowCOD,theprecisionofthemeasurementwillbereducedandthedetectionlimitwillbepoorer.Sampleswithahighchlorideconcentrationwillneedtobepredilutedtogiveachlorideconcentrationofapproximately1000mg/lorlessbeforeanalysis.Themethodoxidizesalmostalltypesoforganiccompoundsandmostinorganicreducingagents.Ithasadetectionlimit(4,65timesthewithin-batchstandarddeviationofablankorverylowstandard)of6mg/lforphotometricdetectionat600nm,and15mg/lfortitrimetricdetectionasreportedbyonelaboratorycomparingthephotometricandtitrimetrictechniquesusingacommercialtestkitwitharangeupto1000mg/l.ThetitrimetricpartofthisInternationalStandardisapplicabletosamplesexhibitinganatypicalcolourorturbidityafterthedigestionstage.NOTEAcomparisonbetweenthefull-scalemethod(ISO6060)andthemethodofthisInternationalStandardisgiveninannexA.AdiscussionofpossiblehazardsisgiveninannexB.Informationoncommercialsmall-scaletestkitsisgiveninannexC.Themethodcanbeusedoverareducedrange(seeannexesDandE).Forcheckingthechlorideconcentration,seeannexF.
【中国标准分类号】:Z16
【国际标准分类号】:13_060_50
【页数】:18P.;A4
【正文语种】:英语
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