BS EN 1899-2-1998 水质.数天后(BODn)生化需氧量的测定.非稀释样品法
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【英文标准名称】:Waterquality-Determinationofbiochemicaloxygendemandafterndays(BODn)-Methodforundilutedsamples
【原文标准名称】:水质.数天后(BODn)生化需氧量的测定.非稀释样品法
【标准号】:BSEN1899-2-1998
【标准状态】:现行
【国别】:英国
【发布日期】:1998-12-15
【实施或试行日期】:1998-12-15
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:生化需氧量;生物化学;生化需氧量(BOD);化学分析和测试;化学指数;水化学;定义;定义(术语);测定;稀释;废水检验;数学计算;效应量度;物质量度;方法;氧;需氧量;参数;质量;评定;污水;标准方法;试验结果;试验;水;水质分析;水常规(实验);水质;水质测试
【英文主题词】:Biochemicaloxygendemand;Biochemistry;BOD;Chemicalanalysisandtesting;Chemicalindices;Chemistryofwater;Definition;Definitions;Determination;Dilution;Examinationofwastewater;Mathematicalcalculations;Measuresofeffects;Measuresofsubstances;Methods;Oxygen;Oxygendemand;Parameters;Quality;Ratings;Sewage;Standardmethods;Testresults;Testing;Water;Wateranalysis;Waterpractice;Waterquality;Watertesting
【摘要】:ThisEuropeanStandardspecifiesdeterminationofthebiochemicaloxygendemandofwatersofundilutedsamples.Thisstandardisapplicabletoallwatershavingbiochemicaloxygendemandsgreaterthanorequaltothelimitofdetermination0,5mg/lofoxygenandnotexceeding6mg/lofoxygen.Inthisstandard,thelimitofdetermination,DL,isdefinedasDL=t0,95(f)·2·sB·1+1/n(1)wheresBisthewithinseriesstandarddeviation,t0,95(f)isthestudentt-value,withfisthedegreesoffreedomforthedeterminationofsBandnisthenumberofanalysisfordeterminationoftheblankinananalyticalseries.sBiscalculatedfromdeterminationsofrealsampleswithaBODcontentrationneartheestimatedDL.Incaseswheretheanalyticalmethoddoesnotrequireanyblankcorrection,theterm1+1/n(2)isomitted.Theresultsobtainedaretheproductofacombinationofbiochemicalandchemicalreactions.Theydonothavetherigorousandunambiguouscharacterofthoseresultingfrom,forexample,asingle,well-defined,chemicalprocess.Nevertheless,theyprovideanindicationfromwhichthequalityofwaterscanbeestimated.Thetestcanbeinfluencedbythepresenceofvarioussubstances.Thosewhicharetoxictomicroorganisms,forexamplebactericides,toxicmetalsorfreechlorine,willinhibitbiochemicaloxidation.Thepresenceofalgaeornitrifyingmicroorganismscanproducehighresults.Inthesesituationsamodificationofthemethod(seeannexBorasdescribedinEN1899-1).Itisabsolutelyessentialthattestsconductedaccordingtothisstandardarecarriedoutbysuitablyqualifiedstaff.AnnexAdescribesalternativeincubationperiods.AnnexBdescribesproceduresformodificationofthemethodbyadditionofseedingmaterial,salts,inhibitionofnitrificationbyallylthiourea(ATU)addition,neutralization,homogenizationand/orfiltration.Thesemodificationsmaybefoundnecessaryforspecificevaluationsofthewaterqualityofreceivingwaters.
【中国标准分类号】:Z16
【国际标准分类号】:13_060_50
【页数】:14P;A4
【正文语种】:英语
【原文标准名称】:水质.数天后(BODn)生化需氧量的测定.非稀释样品法
【标准号】:BSEN1899-2-1998
【标准状态】:现行
【国别】:英国
【发布日期】:1998-12-15
【实施或试行日期】:1998-12-15
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:生化需氧量;生物化学;生化需氧量(BOD);化学分析和测试;化学指数;水化学;定义;定义(术语);测定;稀释;废水检验;数学计算;效应量度;物质量度;方法;氧;需氧量;参数;质量;评定;污水;标准方法;试验结果;试验;水;水质分析;水常规(实验);水质;水质测试
【英文主题词】:Biochemicaloxygendemand;Biochemistry;BOD;Chemicalanalysisandtesting;Chemicalindices;Chemistryofwater;Definition;Definitions;Determination;Dilution;Examinationofwastewater;Mathematicalcalculations;Measuresofeffects;Measuresofsubstances;Methods;Oxygen;Oxygendemand;Parameters;Quality;Ratings;Sewage;Standardmethods;Testresults;Testing;Water;Wateranalysis;Waterpractice;Waterquality;Watertesting
【摘要】:ThisEuropeanStandardspecifiesdeterminationofthebiochemicaloxygendemandofwatersofundilutedsamples.Thisstandardisapplicabletoallwatershavingbiochemicaloxygendemandsgreaterthanorequaltothelimitofdetermination0,5mg/lofoxygenandnotexceeding6mg/lofoxygen.Inthisstandard,thelimitofdetermination,DL,isdefinedasDL=t0,95(f)·2·sB·1+1/n(1)wheresBisthewithinseriesstandarddeviation,t0,95(f)isthestudentt-value,withfisthedegreesoffreedomforthedeterminationofsBandnisthenumberofanalysisfordeterminationoftheblankinananalyticalseries.sBiscalculatedfromdeterminationsofrealsampleswithaBODcontentrationneartheestimatedDL.Incaseswheretheanalyticalmethoddoesnotrequireanyblankcorrection,theterm1+1/n(2)isomitted.Theresultsobtainedaretheproductofacombinationofbiochemicalandchemicalreactions.Theydonothavetherigorousandunambiguouscharacterofthoseresultingfrom,forexample,asingle,well-defined,chemicalprocess.Nevertheless,theyprovideanindicationfromwhichthequalityofwaterscanbeestimated.Thetestcanbeinfluencedbythepresenceofvarioussubstances.Thosewhicharetoxictomicroorganisms,forexamplebactericides,toxicmetalsorfreechlorine,willinhibitbiochemicaloxidation.Thepresenceofalgaeornitrifyingmicroorganismscanproducehighresults.Inthesesituationsamodificationofthemethod(seeannexBorasdescribedinEN1899-1).Itisabsolutelyessentialthattestsconductedaccordingtothisstandardarecarriedoutbysuitablyqualifiedstaff.AnnexAdescribesalternativeincubationperiods.AnnexBdescribesproceduresformodificationofthemethodbyadditionofseedingmaterial,salts,inhibitionofnitrificationbyallylthiourea(ATU)addition,neutralization,homogenizationand/orfiltration.Thesemodificationsmaybefoundnecessaryforspecificevaluationsofthewaterqualityofreceivingwaters.
【中国标准分类号】:Z16
【国际标准分类号】:13_060_50
【页数】:14P;A4
【正文语种】:英语
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