【英文标准名称】:WhitworthPipeThreadsforTubesandFittings;CylindricalScrewLimitRingGaugesforGaugingConicalExternalThreads,Sizes
【原文标准名称】:管与管配件用惠氏管螺纹.测量锥形外螺纹用的圆柱形螺纹极限环规发尺寸
【标准号】:DIN2999Bb.5-1973
【标准状态】:作废
【国别】:
【发布日期】:
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【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】:
【页数】:
【正文语种】:


【英文标准名称】:StandardTestMethodforIroninTraceQuantitiesUsingthe1,10-PhenanthrolineMethod
【原文标准名称】:用1,10-菲咯啉法测定痕量铁值的标准试验方法
【标准号】:ASTME394-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:E15.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:iron;1,10-phenanthroline;photometric;spectrophotometric;Ironcontent--chemicals;Photometry
【摘要】:Thistestmethodissuitablefordeterminingtraceconcentrationsofironinawidevarietyofproducts,providedthatappropriatesamplepreparationhasrenderedtheironandsamplematrixsolubleinwaterorothersuitablesolvent(see10.1andNote6).Thistestmethodassumesthattheamountofcolordevelopedisproportionaltotheamountofironinthetestsolution.Thecalibrationcurveislinearoverthespecifiedrange.PossibleinterferencesaredescribedinSection5.1.1Thistestmethodcoversthedeterminationofironintherangefrom1to100x03BC;g.1.2Thistestmethodisintendedtobegeneralforthefinalstepsinthedeterminationofironanddoesnotincludeproceduresforsamplepreparation.1.3ThistestmethodisapplicabletosampleswhosesolutionshaveapHlessthan2.ItisassumedthatthepHisadjustedtowithinthisrangeinthesamplepreparation.1.4Reviewthecurrentmaterialsafetydatasheets(MSDS)fordetailedinformationconcerningtoxicity,first-aidprocedures,handling,andsafetyprecautions.1.5ThevaluesgiveninSIunitsarethestandard.Valuesinparenthesesareforinformationonly.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H20
【国际标准分类号】:71_040_40
【页数】:5P.;A4
【正文语种】:英语