ISO 2754-1973 工业用尿素缩二脲含量的测定光度法

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【英文标准名称】:Ureaforindustrialuse;Determinationofbiuretcontent;Photometricmethod
【原文标准名称】:工业用尿素缩二脲含量的测定光度法
【标准号】:ISO2754-1973
【标准状态】:作废
【国别】:国际
【发布日期】:1973-12
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/TC47
【标准类型】:()
【标准水平】:()
【中文主题词】:光度测量法;脲;含量测定;缩二脲;光度测量法(化学分析)
【英文主题词】:photometry;ureas;biuret;photometry(chemicalanalysis);determinationofcontent;urea
【摘要】:Applicabletothedeterminationinthepresenceofammoniacalsaltslessthan15mginthealiquotamounttakenforthedetermination.Inthepresenceofquantitiesexceeding15mgtheammoniacalnitrogenshallberemovedbyacationexchangeresinbecausethesesaltsinterferewiththedetermination.Theprincipleofthereactionconsistsinformationofaviolet-redcomplexbetweenallophanicacidamide(H2N.CO.NH.CO.NH2)andcoppersulphateinthepresenceofanalkalinesolutionofpotassiumsodiumtartrate.Photometricmeasurementatawavelengthofabout550nm.HasalsobeenapprovedbytheIUPAC.
【中国标准分类号】:G15
【国际标准分类号】:5605;0520
【页数】:3P;A4
【正文语种】:英语


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Product Code:SAE AS85049/64
Title:Connector Accessories, Electrical, Strain Relief, Split, Straight, Category 4c (Mil-C-38999 Series I and Ii Connectors)
Issuing Committee:Ae-8c1 Connectors Committee
Scope: No scope available.
Rationale: No scope available.【英文标准名称】:StandardPracticeforPolishingandEtchingCoalSamplesforMicroscopicalAnalysisbyReflectedLight
【原文标准名称】:在显微镜下用反射光法人分析煤抛光和腐蚀性的标准实验
【标准号】:ASTMD5671-1995(2005)
【标准状态】:现行
【国别】:
【发布日期】:1995
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D05.28
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:试验;材料;化学分析;评定
【英文主题词】:coalmicroscopicalanalysis;etching;polishing
【摘要】:Componentsobservableinsurfacesofcoalsamplespreparedinaccordancewiththelaboratoryproceduresofthispracticewillhavedifferentialreliefthatwillaidintheirmaceralidentificationbyvisualclassificationandenablesidentificationofplantpartsortissuesthatformedthecoal.SamplespreparedbythispracticecanbeusedformicroscopicaldeterminationofthevolumepercentofphysicalcomponentsofcoalinaccordancewithTestMethodD2799.1.1Thispracticecoverslaboratoryproceduresforpreparinganetched,polishedsurfaceofgranularandblocksamplesofcoalforexaminationwithamicroscopeusingreflectedlightillumination.1.2ThevaluesstatedinSIunitsshallbeconsideredasstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:D20
【国际标准分类号】:73_040
【页数】:4P.;A4
【正文语种】: