【英文标准名称】:Insulatingliquids-Determinationofacidity-Colourimetrictitration
【原文标准名称】:绝缘液体.酸度的测定.比色滴定法
【标准号】:BSEN62021-2-2007
【标准状态】:现行
【国别】:英国
【发布日期】:2007-08-31
【实施或试行日期】:2007-08-31
【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】:酸含量;酸度;酸;比色的;色度特征;色度量度;定义;测定;测量规程;电气工程;电绝缘材料;电绝缘装置;绝缘液体;绝缘材料;绝缘油;液体电绝缘材料;矿物油;试验;滴定法
【英文主题词】:Acidcontent;Acidity;Acids;Colorimetric;Colorimetriccharacteristics;Colorimetricmeasures;Colourimetricmeasures;Definition;Definitions;Determination;Determinationprocedures;Electricalengineering;Electricalinsulatingmaterials;Electricalinsulationdevices;Insulatingliquids;Insulatingmaterials;Insulatingoils;Liquidelectricalinsulatingmaterials;Mineraloils;Testing;Titration
【摘要】:ThispartofIEC62021describesaprocedurefordeterminationoftheacidityofunusedandusedelectricalmineralinsulatingoils.NOTE1Inunusedandusedmineralinsulatingoils,theconstituentsthatmaybeconsideredtohaveacidiccharacteristicsincludeorganicacids,phenoliccompounds,someoxidationproducts,resins,organometallicsaltsandadditives.Themethodmaybeusedtoindicaterelativechangesthatoccurinamineralinsulatingoilduringuseunderoxidizingconditionsthatmayormaynotbeshownbyotherpropertiesoftheresultingmineraloil.Theaciditycanbeusedinthequalitycontrolofunusedmineraloil.Asavarietyofoxidationproductspresentinusedmineraloilcontributetoacidityandtheseproductsvarywidelyintheircorrosionproperties,thetestcannotbeusedtopredictcorrosivenessofamineraloilunderserviceconditions.NOTE2Theacidityresultsobtainedbythistestmethodmayormaynotbenumericallythesameasthoseobtainedbypotentiometricmethods,buttheyaregenerallyofthesamemagnitude.ThepotentiometricmethodusesanendpointatpH11,3toensuretitrationofallspecies,whereasthecolourimetricmethodsusesanindicatorchangingcolouratapproximatelypH9,5.Thismayleadtoslightlyhigherresultsforoilswithaciditiesabove0,3mgKOH/goilwhenusingthepotentiometricmethod.
【中国标准分类号】:E38
【国际标准分类号】:29_040_10
【页数】:20P.;A4
【正文语种】:英语


【英文标准名称】:Dentistry-Metallicmaterialsforfixedandremovablerestorationsandappliances
【原文标准名称】:牙科.固定式和可摘式修复体和牙科器具用金属材料
【标准号】:ISO22674-2006
【标准状态】:现行
【国别】:国际
【发布日期】:2006-11
【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/TC106
【标准类型】:()
【标准水平】:()
【中文主题词】:合金;假牙;金属陶瓷;化学成分;耐腐蚀性;制造日期;定义;牙科设备;牙科材料;牙科;断裂伸长;加标签;作标记;机械性能;金属材料;包装件;产品信息;特性;修复术;修复器械;抽样方法;规范(验收);试样制备;试样;试验
【英文主题词】:Alloys;Artificialdenture;Cermets;Chemicalcomposition;Corrosionresistance;Dataofthemanufacturer;Definitions;Dentalequipment;Dentalmaterials;Dentistry;Elongationatfracture;Labelling;Marking;Mechanicalproperties;Metallicmaterials;Packages;Productinformation;Properties;Prosthesis;Prostheticdevices;Samplingmethods;Specification(approval);Specimenpreparation;Testspecimens;Testing
【摘要】:ThisInternationalStandardclassifiesmetallicmaterialsthataresuitableforthefabricationofdentalappliancesandrestorations,includingmetallicmaterialsrecommendedforuseeitherwithorwithoutaceramicveneer,orrecommendedforbothuses,andspecifiestheirrequirements.Itfurtherspecifiesrequirementswithrespecttopackagingandmarkingtheproductsandtotheinstructionstobesuppliedfortheuseofthesematerials.ThisInternationalStandarddoesnotapplytoalloysfordentalamalgam(ISO24234),dentalbrazingmaterials(ISO9333),ormetallicmaterialsfororthodonticappliances(ISO15841)(e.g.,wire,bracket,bandandscrew).
【中国标准分类号】:C33
【国际标准分类号】:11_060_10
【页数】:22P;A4
【正文语种】:英语