ISO 1620-1976 天然和人造冰晶石二氧化硅含量的测定还原硅钼酸盐分光光度法
时间:2024-05-11 23:07:03 来源: 标准资料网 作者：标准资料网 阅读：8904
【英文标准名称】:Cryolite,naturalandartificial;Determinationofsilicacontent;Reducedmolybdosilicatespectrophotometricmethod
【原文标准名称】:天然和人造冰晶石二氧化硅含量的测定还原硅钼酸盐分光光度法
【标准号】:ISO1620-1976
【标准状态】:现行
【国别】:国际
【发布日期】:1976-09
【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/TC47
【标准类型】:()
【标准水平】:()
【中文主题词】:铝矿;冰晶石;分光光度法;二氧化硅;分光光度测量分析;化学分析;化学分析和试验;含量测定
【英文主题词】:Aluminiumores;Chemicalanalysisandtesting;Cryolite;Determinationofcontent;Silicondioxide;Spectrophotometry
【摘要】:Specifiesmethodsoftestfornaturalandsyntheticmaterialshavingamolarratiosodiumfluoride/aluminiumtrifluoridebetween3and1,7approximately.Themethodisapplicabletoproductsthephosphoruspentoxidecontentofwhichdoesnotexceed0,02%(m/m).Theprocedureconsistsinalkalinefusionofatestportionbymeansofamixtureofsodiumcarbonateandboricacid.DissolutionofthefusedmassinexcessnitricacidsothatthepHvalueisbetween0,7and0,9.Formationofthe(Yellow)oxidizedmolybdosilicateunderclearlydefinedconditionsofacidity,temperature,timeandconcentrationofreagents.Selectivereductioninthepresenceoftartaricacidandmeasurementatawvelengthofabout815nm.
【中国标准分类号】:D59
【国际标准分类号】:73_060_40
【页数】:5P.;A4
【正文语种】:英语
Product Code:SAE AMS3072
Title:Compound, Corrosion Preventive Aircraft Engine
Issuing Committee:Ams B Finishes Processes And Fluids Committee
Scope:This specification covers a blend of corrosion-preventive compound concentrate and petroleum-base aircraft-engine lubricating oil in the form of a ready-to-use liquid.【英文标准名称】:Insulatingliquids-Methodsforcountingandsizingparticles
【原文标准名称】:绝缘液体.粒子计数和大小测定用方法
【标准号】:IEC60970-2007
【标准状态】:现行
【国别】:国际
【发布日期】:2007-07
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/TC10
【标准类型】:()
【标准水平】:()
【中文主题词】:分析;自动化;光束;计数;电气工程;电绝缘材料;绝缘液体;绝缘油;液体电绝缘材料;液体;方法;显微分析;显微术;颗粒数;光学显微镜;粒径分析;粒度测量;粒度;抽样方法;测试
【英文主题词】:Analysis;Automation;Beamsoflight;Counting;Electricalengineering;Electricalinsulatingmaterials;Insulatingliquids;Insulatingoils;Liquidelectricalinsulatingmaterials;Liquids;Methods;Microscopicanalysis;Microscopy;Numberofparticles;Opticalmicroscopes;Particlenumber;Particlesizeanalysis;Particlesizemeasurement;Particlesizes;Samplingmethods;Testing
【摘要】:Thisstandarddescribesthesamplingproceduresandmethodsforthedeterminationofparticleconcentrationandsizedistribution.Threemethodsarespecified.Oneusesanautomaticparticlesizeanalyser,workingonthelightinterruptionprinciple.Theothertwouseanopticalmicroscope,ineitherthetransmittedlightorincidentlightmode,tocountparticlescollectedonthesurfaceofamembranefilter.TheopticalmicroscopemethodsaredescribedinISO4407.Allthreemethodsareapplicabletobothusedandunusedinsulatingliquids.AnnexAcontainsanalternativesamplingprocedureusingasyringeandAnnexBreportsareferenceforthecalibrationofautomaticparticlecounters.
【中国标准分类号】:K15;E38
【国际标准分类号】:17_220_99;29_040_10
【页数】:40P.;A4
【正文语种】:英语