EN 50065-7-2001 频率范围为3kHz-148.5kHz的低压电气设备的信号传输.第7部分:设备阻抗;德文版本EN50065-7:2001
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【英文标准名称】:Signallingonlow-voltageelectricalinstallationsinthefrequencyrange3kHzto148,5kHz-Part7:Equipmentimpedance;GermanversionEN50065-7:2001
【原文标准名称】:频率范围为3kHz-148.5kHz的低压电气设备的信号传输.第7部分:设备阻抗;德文版本EN50065-7:2001
【标准号】:EN50065-7-2001
【标准状态】:现行
【国别】:
【发布日期】:2002-06
【实施或试行日期】:2002-06-01
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:信号;频带;频率;阻抗;数据传送;传输系统;传输性能;电阻器;分配网;电力设备;规范(验收);信号传输;低压设备;低压电源;负载阻抗;定义;仪器;电气工程
【英文主题词】:Bandoffrequencies;Datatransfer;Definition;Definitions;Distributionnetworks;Electricalengineering;Electricalinstallations;Frequencies;Impedance;Instruments;Loadimpedance;Lowvoltagemains;Low-voltageinstallations;Resistors;Signaltransmission;Signals;Specification(approval);Transmissionperformance;Transmissionsystems
【摘要】:
【中国标准分类号】:K40
【国际标准分类号】:33_040_30
【页数】:23P.;A4
【正文语种】:英语
【英文标准名称】:Waterquality-Determinationofbiochemicaloxygendemandafterndays(BODn)-Dilutionandseedingmethodwithallylthioureaaddition
【原文标准名称】:水质.数天后生化需氧的测定.加入烯丙基硫醇的稀释和接种法
【标准号】:BSEN1899-1-1998
【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】:生物化学;定义;定义(术语);测定;稀释;稀释法;擒纵机构;数学计算;方法;氮化合物;氧;需氧量;质量;抽样方法;试验结果;试验;疫苗;水;水质分析;水常规(实验);水质;水域
【英文主题词】:Biochemistry;Definition;Definitions;Determination;Dilution;Dilutionmethods;Escapementmechanisms;Mathematicalcalculations;Methods;Nitrification;Oxygen;Oxygendemand;Quality;Samplingmethods;Testresults;Testing;Vaccines;Water;Wateranalysis;Waterpractice;Waterquality;Waters
【摘要】:ThisEuropeanStandardspecifiesadeterminationofthebiochemicaloxygendemandofwatersbydilutionandseedingwithsuppressionofnitrification.Thisstandardisapplicabletoallwatershavingbiochemicaloxygendemandsgreaterthanorequaltothelimitofdetermination3mg/lofoxygenandnotexceeding6000mg/lofoxygen.Forbiochemicaloxygendemandsgreaterthan6000mgofoxygen/l,themethodisstillapplicable,buttheerrorscausedbythenecessarydilutionscaninfluencetheanalyticalqualityofthetestmethodandtheresultsaretobeinterpretedwithcircumspection.Inthisstandardthelimitofdetection,DL,isdefinedasDL=t0,95(f)·2·sB·1+1/n(1)wheresBisthewithinseriesstandarddeviation,t0,95(f)isthestudentt-value,withfisthedegreesoffreedomforthedeterminationofsBandnisthenumberofanalysisfordeterminationoftheblankinananalyticalseries,sBiscalculatedfromdeterminationsofrealsampleswithaBODcontentneartheestimatedDL.Incaseswheretheanalyticalmethoddoesnotrequireanyblankcorrectiontheterm1+1/n(2)isomitted.Theresultsobtainedaretheproductofacombinationofbiochemicalandchemicalreactions.Theydonothavetherigorousandunambiguouscharacterofthoseresultingfrom,forexample,asingle,well-defined,chemicalprocess.Nevertheless,theyprovideanindicationfromwhichthequalityofwaterscanbeestimated.Thetestcanbeinfluencedbythepresenceofvarioussubstances.Thosewhicharetoxictomicroorganisms,forexamplebactericides,toxicmetalsorfreechlorine,willinhibitbiochemicaloxidation.Thepresenceofalgaeornitrifyingmicroorganismscanproduceartificiallyhighresults.Itisabsolutelyessentialthattestsconductedaccordingtothisstandardarecarriedoutbysuitablyqualifiedstaff.AnnexAdescribesalternativeincubationperiods.AnnexBdescribesmultitesting,whichcanbeusedtoobtainenhancedprecisionortodemonstratethepresenceofsubstancestoxictomicroorganisms.
【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
【英文标准名称】:Non-fattyfoods-Multiresiduemethodsforthegaschromatographicdeterminationofpesticideresidues-Part3:Determinationandconfirmatorytests;GermanversionEN12393-3:1998
【原文标准名称】:非脂肪食品.残留农药气相色谱测定用多种残物留法.第2部分:测定和验证试验
【标准号】:DINEN12393-3-1998
【标准状态】:作废
【国别】:德国
【发布日期】:1998-12
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:气相色谱法;食品;无脂肪;规范(验收);含量测定;分析方法;保护(装置);食品检验;气体检测器;残留试验;农药;化学分析和试验;测定
【英文主题词】:Chemicalanalysisandtesting;Determination;Determinationofcontent;Foodinspection;Foodproducts;Gaschromatography;Gasdetectors;Methodsofanalysis;Non-fatty;Pesticides;Protection;Residuetests;Specification(approval)
【摘要】:Thedocumentspecifiesmultimethodsforthedeterminationofpesticideresiduesinfoodstuffs.Themethodsmakeuseofgaschromatographyandselectiondetectors.Part3listssomerecommendedtechniquesfordetectionanddeterminationandconfirmationofresults.
【中国标准分类号】:C53;X09
【国际标准分类号】:67_050
【页数】:8P;A4
【正文语种】:德语
