【英文标准名称】:Determinationofplatinuminplatinumjewelleryalloys-Gravimetricdeterminationbyreductionwithmercury(I)chloride
【原文标准名称】:铂合金首饰中含铂量的测定氯化汞还原重量法
【标准号】:ISO11489-1995
【标准状态】:现行
【国别】:国际
【发布日期】:1995-05
【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/TC174
【标准类型】:()
【标准水平】:()
【中文主题词】:铂合金;铂;重量分析;含量测定;还原;珠宝;汞化合物;测定
【英文主题词】:Chemicalanalysisandtesting;Determination;Determinationofcontent;Gravimetricanalysis;Jewellery;Mercurycompounds;Methods;Platinum;Platinumalloys;Reduction;Testing
【摘要】:Specifiesagravimetricmethodforthedeterminationofplatinuminplatinumjewelleryalloys,preferablywithintherangeoffinenessstatedinISO9202.Theprocedureappliesspecificallytoplatinumalloysincorporatingpalladium,iridium,rhodium,copper,cobalt,gold,ruthenium,gallium,chromium,indiumandlessthan5%tungsten.Somemodificationsareindicatedwherepalladium,iridium,rhodium,goldorrutheniumarepresent.
【中国标准分类号】:H15
【国际标准分类号】:39_060
【页数】:4P;A4
【正文语种】:英语


【英文标准名称】:StandardPracticeforDerivationofDecisionPointandConfidenceLimitforStatisticalTestingofMeanConcentrationinWasteManagementDecisions
【原文标准名称】:在废物管理决策中主浓度静态试验用决策点和可信限度偏差的标准实施规程
【标准号】:ASTMD6250-1998(2009)
【标准状态】:现行
【国别】:美国
【发布日期】:1998
【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】:D34.01.01
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:confidencelimit;dataqualityobjectives;decisionerror;decisionpoint;falsenegative;falsepositive;hypothesis;meanconcentration;presumption;wastemanagement;Confidenceinterval/limit/coefficient;Dataqualityobjectives(DQO);Decisionanaly
【摘要】:Environmentaldecisionsoftenrequirethecomparisonofastatistictoadecisionpointorthecomparisonofaconfidencelimittoaregulatorylimittodeterminewhichoftwoalternateactionsistheproperonetotake.Thispracticeprovidesalogicalbasisforstatisticallyderivingadecisionpoint,oraconfidencelimitasanalternative,fordifferentunderlyingpresumptions.Thispracticeisusefultousersofaplanningprocessgenerallyknownasthedataqualityobjectives(DQO)process(seePracticeD5792),inwhichcalculationofadecisionpointisneededforthedecisionrule.1.1Thispracticecoversalogicalbasisforthederivationofadecisionpointandconfidencelimitwhenmeanconcentrationisusedformakingenvironmentalwastemanagementdecisions.Thedeterminationofadecisionpointorconfidencelimitshouldbemadeinthecontextofthedefinedproblem.Themainfocusofthispracticeisonthedeterminationofadecisionpoint.1.2Inenvironmentalmanagementdecisions,thederivationofadecisionpointallowsadirectcomparisonofasamplemeanagainstthisdecisionpoint,wheresimilardecisionscanbemadebycomparingaconfidencelimitagainstaconcentrationlimit(forexample,aregulatorylimit,whichwillbeusedasasurrogatetermforanyconcentrationlimitthroughoutthispractice).Thispracticefocusesonmakingenvironmentaldecisionsusingthiskindofstatisticalcomparison.Otherfactors,suchasanyqualitativeinformationthatmaybeimportanttodecision-making,arenotconsideredhere.1.3Adecisionpointisaconcentrationlevelstatisticallyderivedbasedonaspecifieddecisionerrorandisusedinadecisionruleforthepurposeofchoosingbetweenalternativeactions.1.4Thispracticederivesthedecisionpointandconfidencelimitintheframeworkofastatisticaltestofhypothesisunderthreedifferentpresumptions.Therelationshipbetweendecisionpointandconfidencelimitisalsodescribed.1.5Determinationofdecisionpointsandconfidencelimitsforstatisticsotherthanmeanconcentrationisnotcoveredinthispractice.Thispracticealsoassumesthatthedataarenormallydistributed.Whenthisassumptiondoesnotapply,atransformationtonormalizethedatamaybeneeded.Ifotherstatisticaltestssuchasnonparametricmethodsareusedinthedecisionrule,thispracticemaynotapply.Whentherearemanydatapointsbelowthedetectionlimit,themethodsinthispracticemaynotapply.
【中国标准分类号】:Z04
【国际标准分类号】:
【页数】:14P.;A4
【正文语种】:英语