基本信息
| 标准名称： | 模具铣刀 直柄圆锥形立铣刀 |
| 中标分类： |
机械 >>
工艺装备 >>
刀具 |
| 替代情况： | 调整为JB/T 7966.4-1995 |
| 发布日期： | 1900-01-01 |
| 实施日期： | 1987-03-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 出版日期： | 1900-01-01 |
| 页数： | 4页 |
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所属分类： 机械 工艺装备 刀具
【英文标准名称】:StandardTestMethodforSulfurinPetroleumProductsbyWavelengthDispersiveX-rayFluorescenceSpectrometry
【原文标准名称】:波长色散X射线荧光光谱法测定石油产品中硫含量的标准试验方法
【标准号】:ASTMD2622-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:D02.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:analysis;diesel;gasoline;jetfuel;kerosene;petroleum;spectrometry;sulfur;wavelengthdispersivex-rayfluorescence;X-ray;Petroleumproducts(liquid);Fueloils;Spectroscopy--X-rayfluorescence(XRF);Fuelsulfur;X-rayspectrometry;XRF(X-rayf
【摘要】:Thistestmethodprovidesrapidandprecisemeasurementoftotalsulfurinpetroleumandpetroleumproductswithaminimumofsamplepreparation.Atypicalanalysistimeis1to2minutespersample.Thequalityofmanypetroleumproductsisrelatedtotheamountofsulfurpresent.Knowledgeofsulfurconcentrationisnecessaryforprocessingpurposes.Therearealsoregulationspromulgatedinfederal,state,andlocalagenciesthatrestricttheamountofsulfurpresentinsomefuels.Thistestmethodprovidesameansofdeterminingwhetherthesulfurcontentofpetroleumorapetroleumproductmeetsspecificationorregulatorylimits.Whenthistestmethodisappliedtopetroleummaterialswithmatricessignificantlydifferentfromthewhiteoilcalibrationmaterialsspecifiedinthistestmethod,thecautionsandrecommendationsinSection5shouldbeobservedwheninterpretingresults.Note28212;TheequipmentspecifiedforTestMethodD2622tendstobemoreexpensivethanthatrequiredforalternativetestmethods,suchasTestMethodD4294.ConsulttheIndextoASTMStandardsforalternativetestmethods.1.1Thistestmethodcoversthedeterminationoftotalsulfurinpetroleumandpetroleumproductsthataresingle-phaseandeitherliquidatambientconditions,liquefiablewithmoderateheat,orsolubleinhydrocarbonsolvents.Thesematerialscanincludedieselfuel,jetfuel,kerosene,otherdistillateoil,naphtha,residualoil,lubricatingbaseoil,hydraulicoil,crudeoil,unleadedgasoline,gasoholandbiodiesel.1.2TherangeofthistestmethodisbetweenthePLOQvalue(calculatedbyproceduresconsistentwithPracticeD6259)of3mg/kgtotalsulfurandthehighestlevelsampleintheroundrobin,4.6wt.%totalsulfur.Note18212;Instrumentationcoveredbythistestmethodcanvaryinsensitivity.Theapplicabilityofthetestmethodatsulfurconcentrationsbelow3mg/kgmaybedeterminedonanindividualbasisforWDXRFinstrumentscapableofmeasuringlowerlevels,butprecisioninthistestmethoddoesnotapply.1.2.1Thevaluesofthelimitofquantitation(LOQ)andmethodprecisionforaspecificlaboratoryx2019;sinstrumentdependsoninstrumentsourcepower(loworhighpower),sampletype,andthepracticesestablishedbythelaboratorytoperformthemethod.1.3Samplescontainingmorethan4.6mass%sulfurshouldbedilutedtobringthesulfurconcentrationofthedilutedmaterialwithinthescopeofthistestmethod.SamplesthataredilutedcanhavehighererrorsthanindicatedinSection14thannon-dilutedsamples.1.4Volatilesamples(suchashighvaporpressuregasolinesorlighthydrocarbons)maynotmeetthestatedprecisionbecauseofselectivelossoflightmaterialsduringtheanalysis.1.5Afundamentalassumptioninthistestmethodisthatthestandardandsamplematricesarewellmatched,orthatthematrixdifferencesareaccountedfor(see12.2).MatrixmismatchcanbecausedbyC/Hratiodifferencesbetweensamplesandstandardsorbythepresenceofotherinterferingheteroatomsorspecies(seeTable1).1.6ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesa......
【中国标准分类号】:E30
【国际标准分类号】:75_080
【页数】:12P.;A4
【正文语种】:英语