【英文标准名称】:Waterquality-Determinationofbiochemicaloxygendemandafterndays(BOD)-Part2:Methodforundilutedsamples
【原文标准名称】:水质.n日生化需氧量(BODn)的测定.第2部分:未稀释样品的测定法
【标准号】:ISO5815-2-2003
【标准状态】:现行
【国别】:国际
【发布日期】:2003-04
【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】:数学计算;化学分析和试验;BOD;试验;方法;额定值;水常规(实验);测定;稀释;生物化学;化学指数;生化需氧量;污水;废水检验;效应量度;物质量度;参数;氧;水质分析;需氧量;试验结果;水化学;定义;质量;水质试验;标准方法;水;水质
【英文主题词】:Biochemicaloxygendemand;Biochemistry;BOD;Chemicalanalysisandtesting;Chemicalindices;Chemistryofwater;Definitions;Determination;Dilution;Examinationofwastewater;Mathematicalcalculations;Measuresofeffects;Measuresofsubstances;Methods;Oxygen;Oxygendemand;Parameters;Quality;Ratings;Sewage;Standardmethods;Testresults;Testing;Water;Wateranalysis;Waterpractice;Waterquality;Watertesting
【摘要】:ThispartofISO5815specifiesdeterminationofthebiochemicaloxygendemand(BOD)ofwatersofundilutedsamples.Itisapplicabletoallwatershavingbiochemicaloxygendemandsgreaterthanorequalto0,5mg/lofoxygen(thelimitofdetermination)andnotexceeding6mg/lofoxygen.Theresultsobtainedaretheproductofacombinationofbiochemicalandchemicalreactions.Theydonothavetherigorousandunambiguouscharacterofthoseresultingfrom,forexample,asingle,well-defined,chemicalprocess.Nevertheless,theyprovideanindicationfromwhichthequalityofwaterscanbeestimated.Thetestcanbeinfluencedbythepresenceofvarioussubstances.Thosewhicharetoxictomicroorganisms,forexamplebactericides,toxicmetalsorfreechlorine,inhibitbiochemicaloxidation.Thepresenceofalgaeornitrifyingmicroorganismscanproduceartificiallyhighresults.Inthesesituationsamodificationofthemethodmaybenecessary.AnnexAdescribesalternativeincubationperiods.AnnexBdescribesproceduresformodificationofthemethodbyadditionofseedingmaterial,salts,inhibitionofnitrificationbyallylthiourea(ATU)addition,neutralization,homogenizationand/orfiltration.Thesemodificationsmaybefoundnecessaryforspecificevaluationsofthewaterqualityofreceivingwaters.AnnexCprovidesprecisiondata.
【中国标准分类号】:Z16
【国际标准分类号】:13_060_50
【页数】:13P.;A4
【正文语种】:英语


【英文标准名称】:TestMethodsforImpactResistanceofRigidPoly(VinylChloride)(PVC)BuildingProducts
【原文标准名称】:刚性聚氯乙烯(PVC)建筑制品的耐冲击性试验方法
【标准号】:ASTMD4226-1998
【标准状态】:作废
【国别】:美国
【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(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:冲击强度;塑料制品;聚氯乙烯;塑料;建筑;冲击试验;试验
【英文主题词】:polyvinylchloride;plasticsproducts;impactstrength;construction;plastics;impacttesting;testing
【摘要】:
【中国标准分类号】:Q04
【国际标准分类号】:83_080_20
【页数】:
【正文语种】:英语