【英文标准名称】:StandardTestMethodsforSpecificGravity,Apparent,ofLiquidIndustrialChemicals
【原文标准名称】:液态工业化合物的比重,表观比重的标准试验方法
【标准号】:ASTMD891-2009
【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】:analysis;apparent;hydrometer;pycnometer;specificgravity;Chemicalanalysis--chemicals;Industrialaromatichydrocarbons;Specificgravity--chemicals
【摘要】:Specificgravity,apparent,maybeusedasaqualitativetestinestablishingtheidentityofachemical.Itmaybeusedtocalculatethevolumeoccupiedbyaproductwhoseweightisknown,ortocalculatetheweightofaproductfromitsvolume.Itmaybeusedtodeterminethecompositionofbinarymixturesofpurechemicals.Inthecaseofmostrefinedindustrialchemicalsspecificgravity,apparent,isofminimalvalueindefiningquality,althoughitmaydetectgrosscontamination.Ofthetwotestmethodsdescribed,thepycnometermethod(TestMethodB,1.1.2)isthemostaccurateandprecise.Forthisreasonitisthepreferredmethodincaseofdisputes.Thehydrometermethod(TestMethodA,1.1.1)istheleastaccurateandprecise,butitisalsothesimplestandfastesttoperformandisoftenentirelysatisfactoryformanypurposes.Ifthesampleistooviscoustopermitthehydrometertofloatfreely,thepycnometertestmethodshouldbeused.1.1Thesetestmethodscoverthedeterminationofthespecificgravity,apparent,ofliquidindustrialchemicals.Twotestmethodsarecoveredasfollows:1.1.1TestMethodA,specificgravity,apparent,bymeansofahydrometer.1.1.2TestMethodB,specificgravity,apparent,bymeansofapycnometer.Note18212;TestMethodD4052describesaninstrumentalprocedure.1.2Incommonusagethetermspecificgravity,apparent,isunderstoodtomeanspecificgravity.SincethistestmethodistobeinconformitywithTerminologyE12,alltermsreadingspecificgravitywerechangedtospecificgravity,apparent,withoutalteringthemeaningofspecificgravityand,thetermapparentcouldbedroppedineverydayoperationsafterestablishingtheusetermequivalency.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.NootherunitsofmeasurementareincludedinthesetestmethodswiththeexceptionofFahrenheit(x00B0;F)in5.1asanexampleofapossibleindustrialspecificationunit.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.1.5ReviewthecurrentMaterialsSafetyDataSheets(MSDS)fordetailedinformationconcerningtoxicity,firstaidprocedures,handling,andsafetyprecautions.
【中国标准分类号】:G04
【国际标准分类号】:71_100_01
【页数】:5P.;A4
【正文语种】:英语