【英文标准名称】:StandardPracticeforAcid-ExtractionofElementsfromSedimentsUsingClosedVesselMicrowaveHeating
【原文标准名称】:使用封闭式微波炉加热法从沉淀物中酸萃取元素的标准实施规程
【标准号】:ASTMD5258-2002(2007)
【标准状态】:现行
【国别】:
【发布日期】:2002
【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】:D19.07
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:digestion;microwave;sediments;soils;vessel
【摘要】:Partialextractionofsoilsandsedimentscanprovideinformationontheavailabilityofelementstoleeching,waterqualitychanges,orothersiteconditions.Rapidheating,incombinationwithtemperaturesinexcessoftheatmosphericboilingpointofnitricacid,reducessamplepreparationorreactiontimes.Littleornoacidsarelosttoboilingorevaporationinthecloseddigestionvesselsoadditionalportionsofacidmaynotberequired.Increasedblankcorrectionsfromtraceimpuritiesinacidareminimized.1.1Thispracticecoversthedigestionofsoilsandsedimentsforsubsequentdeterminationofacid-extractableconcentrationsofcertainelementsbysuchtechniquesasatomicabsorptionandatomicemissionspectroscopy.1.1.1Concentrationsofarsenic,cadmium,copper,lead,magnesium,manganese,nickel,andzinccanbeextractedfromtheprecedingmaterials.Otherelementsmaybedeterminedusingthispractice.1.2Theanalyticalsampleisarbitrarilydefinedasthatwhichpassesa10-mesh(approximately2-mmopenings)screenandispreparedaccordingtoPracticeD3974.1.3ActualelementquantitationcanbeaccomplishedbyfollowingthevarioustestmethodsunderotherappropriateASTMstandardsforelement(s)ofinterest.1.4Thedetectionlimitandlinearconcentrationrangeforeachelementisdependentontheatomicabsorptionoremissionspectrophotometrictechniqueemployedandmaybefoundinthemanualaccompanyingtheinstrumentused.1.5Beforeselectingadigestiontechnique,theusershouldconsulttheappropriatequantitationstandard(s)foranyspecialanalyticalconsiderations,andPracticeD3974foranyspecialpreparatoryconsiderations.1.6Theextentofextractionofelementsfromsoilsandsedimentsbythismethodisdependentuponthephysicalandmineralogiccharacteristicsofthepreparedsample.1.7Thevaluesstatedinbothinch-poundandSIunitsaretoberegardedseparatelyasthestandard.Thevaluesgiveninparenthesesareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecifichazardstatements,seeSection8.
【中国标准分类号】:Z16
【国际标准分类号】:13_080_10
【页数】:4P.;A4
【正文语种】:


【英文标准名称】:Testmethodsofopticalisolators
【原文标准名称】:光隔离器试验方法
【标准号】:JISC5933-2012
【标准状态】:现行
【国别】:
【发布日期】:2012-11-20
【实施或试行日期】:
【发布单位】:日本工业标准调查会(JP-JISC)
【起草单位】:TechnicalCommitteeonElectronics
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:
【国际标准分类号】:33_180_20
【页数】:14P;A4
【正文语种】:日语