基本信息
| 标准名称： | 贵金属及其合金化学分析方法 金、钯合金中银量的测定 |
| 英文名称： | Gold,Palladium alloys-Determination of silver content |
| 中标分类： |
冶金 >>
金属化学分析方法 >>
贵金属及其合金分析方法 |
| ICS分类： |
冶金 >>
有色金属 >>
镉、钴及其合金
|
| 替代情况： | 替代YB 946(Au-9)-1978 YB 946(Au-15)-1978;被GB/T 15072.5-2008代替 |
| 发布部门： | 中国有色金属工业协会 |
| 发布日期： | 1994-05-11 |
| 实施日期： | 1994-01-02 |
| 首发日期： | 1994-05-11 |
| 作废日期： | 2008-09-01 |
| 主管部门： | 中国有色金属工业协会 |
| 归口单位： | 全国有色金属标准化技术委员会 |
| 起草单位： | 昆明贵金属研究所 |
| 出版社： | 中国标准出版社 |
| 出版日期： | 1900-01-01 |
| 页数： | 4页 |
适用范围
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前言
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目录
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引用标准
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所属分类： 冶金 金属化学分析方法 贵金属及其合金分析方法 冶金 有色金属 镉 钴及其合金
【英文标准名称】:StandardTestMethodforHazeandLuminousTransmittanceofTransparentPlastics
【原文标准名称】:透明塑料混浊度和透光率的标准试验方法
【标准号】:ASTMD1003-2007e1
【标准状态】:现行
【国别】:美国
【发布日期】:2007
【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】:D20.40
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:haze;luminoustransmittance;regulartransmittance;transparentplastics;Haze;Lighttransmissionandreflection;Spectrophotometry;Transmittanceandreflectance--plastics;Transparentplastics
【摘要】:Lightthatisscattereduponpassingthroughafilmorsheetofamaterialcanproduceahazyorsmokyfieldwhenobjectsareviewedthroughthematerial.Anothereffectcanbeveilingglare,asoccursinanautomobilewindshieldwhendrivingintothesun.Althoughhazemeasurementsaremademostcommonlybytheuseofahazemeter,aspectrophotometermaybeused,providedthatitmeetsthegeometricandspectralrequirementsofSection5.Theuseofaspectrophotometerforhazemeasurementofplasticscanprovidevaluablediagnosticdataontheoriginofthehaze,andProcedureBisdevotedtotheuseofaspectrophotometer.ProcedureA(hazemeter)testvaluesarenormallyslightlyhigherandlessvariablethanProcedureB(spectrophotometer)testvalues.Regularluminoustransmittanceisobtainedbyplacingaclearspecimenatsomedistancefromtheentranceportoftheintegratingsphere.However,whenthespecimenishazy,thetotalhemisphericalluminoustransmittancemustbemeasuredbyplacingthespecimenattheentranceportofthesphere.Themeasuredtotalhemisphericalluminoustransmittancewillbegreaterthantheregularluminoustransmittance,dependingontheopticalpropertiesofthesample.Withthistestmethod,thespecimenisnecessarilyplacedattheentranceportofthesphereinordertomeasurehazeandtotalhemisphericalluminoustransmittance.Hazedatarepresentativeofthematerialmaybeobtainedbyavoidingheterogeneoussurfaceorinternaldefectsnotcharacteristicofthematerial.Hazeandluminous-transmittancedataareespeciallyusefulforqualitycontrolandspecificationpurposes.Beforeproceedingwiththistestmethod,referenceshouldbemadetothespecificationofthematerialbeingtested.Anytestspecimenpreparation,conditioning,dimensions,ortestingparameters,orcombinationthereof,coveredinthematerialsspecificationshalltakeprecedenceoverthosementionedinthistestmethod.Iftherearenomaterialspecifications,thenthedefaultconditionsapply.1.1Thistestmethodcoverstheevaluationofspecificlight-transmittingandwide-angle-light-scatteringpropertiesofplanarsectionsofmaterialssuchasessentiallytransparentplastic.Twoproceduresareprovidedforthemeasurementofluminoustransmittanceandhaze.ProcedureAusesahazemeterasdescribedinSection5andProcedureBusesaspectrophotometerasdescribedinSection8.Materialhavingahazevaluegreaterthan30%isconsidereddiffusingandshouldbetestedinaccordancewithPracticeE167.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Note18212;Forgreaterdiscriminationamongmaterialsthatscatterahighpercentoflightwithinanarrowforwardangle,suchasisthecasewithabradedtransparentplastics,adjustthehazemeterandperformmeasurementsinaccordancewithTestMethodD1044.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note28212;ThistestmethodisnotequivalenttoISO13468x2013;1andISO/DIS14782.
【中国标准分类号】:G31
【国际标准分类号】:83_140_99
【页数】:7P.;A4
【正文语种】:英语