BS ISO 15705-2002 水质.化学需氧量的测定(ST-COD).小型密封管法
时间:2024-05-17 20:47:00 来源: 标准资料网 作者：标准资料网 阅读：8439
【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】:BSISO15705-2002
【标准状态】:现行
【国别】:英国
【发布日期】:2002-12-10
【实施或试行日期】:2002-12-10
【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】:容器(玻璃);化学分析和测试;化学需氧量;定义;定义(术语);测定;含量测定;需氧量;质量;抽样方法;污水;标准方法;试验;水;水常规(实验);水质
【英文主题词】:Cells(glass);Chemicalanalysisandtesting;Chemicaloxygendemand;Definition;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】:28P.;A4
【正文语种】:英语
【英文标准名称】:Toolsformoulding;centringsleeves
【原文标准名称】:模铸工具定心套
【标准号】:ISO9449-1990
【标准状态】:作废
【国别】:国际
【发布日期】:1990-12
【实施或试行日期】:1990-12-01
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/TC29
【标准类型】:()
【标准水平】:()
【中文主题词】:元部件;铸模设备;铸造学;定心套筒;名称与符号;形状;尺寸
【英文主题词】:Centeringsleeves;Components;Designations;Dimensions;Foundryengineering;Mouldingequipment;Shape;Tools
【摘要】:Specifiesthedimensionsandtolerancesforcentringsleevesintendedtobeusedforlocatingthespacingblocksinrelationtothefixedclampplatesinmoulds.Givesexamplesofmaterialsandhardness,andspecifiesthedesignationofcentringsleeves.
【中国标准分类号】:J61
【国际标准分类号】:21_060_60;25_120_30
【页数】:2P;A4
【正文语种】:英语
【英文标准名称】:Temperature-indicatingand-regulatingequipment
【原文标准名称】:温度指示和调节设备
【标准号】:UL873-2007
【标准状态】:现行
【国别】:美国
【发布日期】:2007-11-16
【实施或试行日期】:
【发布单位】:美国保险商实验所(UL)
【起草单位】:UL
【标准类型】:()
【标准水平】:()
【中文主题词】:空调;设计;设备;加热装置;指示器;测量仪器;性能;制冷;温度调节器;规范(验收);温度控制;温度控制器;温度指示器;温度测量;温度测量法;温度试验;温度测量仪表;试验性能;测试
【英文主题词】:
【摘要】:Theserequirementscoverelectricalequipmentforcontrolofair-conditioning,heating,cooking,refrigeration,andhumidity,rated600voltsorless,tobeusedinordinarylocationsinaccordancewiththeNationalElectricalCode,NFPA70.Theserequirementscovergeneral-useequipmentforfield-installationandcontrolsintendedtobefactoryinstalledonorincertainappliancesassafety,limiting,oroperatingcontrols.Thesecontrolsresponddirectlyorindirectlytochangesintemperature,humidity,orpressuretoeffectcontrolofequipmentorapplianceoperation.Theserequirementsdonotcoverlow-voltagethermostats,dampercontrolsorsimilardevicesintendedforconnectiononlytoalow-voltagecircuitoflimitedpowersuppliedbyaprimarybatteryorbyaClass2transformer.Anassemblyconsistingofaline-voltagetransformerwithalow-voltagesecondaryincorporatedasanintegralpartofacontrol,suchasathermostatoradampercontrol,isconsideredtobewithinthescopeoftheserequirements.See6.1.Aproductthatcontainsfeatures,characteristics,components,materials,orsystemsnewordifferentfromthosecoveredbytherequirementsinthisstandard,andthatinvolvesariskoffireorofelectricshockorinjurytopersonsshallbeevaluatedusingappropriateadditionalcomponentandend-productrequirementstomaintainthelevelofsafetyasoriginallyanticipatedbytheintentofthisstandard.Aproductwhosefeatures,characteristics,components,materials,orsystemsconflictwithspecificrequirementsorprovisionsofthisstandarddoesnotcomplywiththisstandard.Revisionofrequirementsshallbeproposedandadoptedinconformancewiththemethodsemployedfordevelopment,revision,andimplementationofthisstandard.
【中国标准分类号】:N11
【国际标准分类号】:17_200_20
【页数】:
【正文语种】:英语