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【英文标准名称】:StandardTestMethodforDeterminationofpHeofEthanol,DenaturedFuelEthanol,andFuelEthanol(Ed75-Ed85)
【原文标准名称】:乙醇、改性燃料乙醇和燃料乙醇Ed75-ed85的Phe测定的标准试验方法
【标准号】:ASTMD6423-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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.A0.02
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:acidstrength;automotivesparkignitionenginefuel;corrosionpotential;denaturedfuelethanol;ethanol;fuelethanol;pHe;Denaturedfuelethanol;Ethanol;Fuelethanol(Ed75-Ed85);pH
【摘要】:Theacidstrength,asmeasuredbypHe,isagoodpredictorofthecorrosionpotentialofethanolfuels.Itispreferabletototalaciditybecausetotalaciditydoesnotmeasureacidstrength;overestimatesthecontributionofweakacids,suchascarbonicacid;andmayunderestimatethecorrosionpotentialoflowconcentrationsofstrongacids,suchassulfuricacid.1.1Thistestmethodcoversaproceduretodetermineameasureoftheacidstrengthofhighethanolcontentfuels.Theseincludeethanol,denaturedfuelethanol,andfuelethanol(Ed75-Ed85).Thetestmethodisapplicabletofuelscontainingnominally70volume%ethanol,orhigher,asdescribedinSpecificationsD4806andD5798.1.2AcidstrengthasmeasuredinthistestmethodisdefinedaspHe.ApHevalueforalcoholsolutionsisnotcomparabletopHvaluesofwatersolutions.Forexample,a1.5x00D7;10-5M(18ppm)solutionofH2SO4givesapHofabout5.5inwatersolution,but,dependingonbufferingstrength,apHeaslowas1to2inunadditizedalcoholfuel.1.3ThevalueofpHemeasuredwilldependsomewhatonthefuelblend,thestirringrate,andthetimetheelectrodeisinthefuel.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:E31
【国际标准分类号】:27_060_10
【页数】:3P.;A4
【正文语种】:英语


【英文标准名称】:Ironores-Determinationofnickel-Flameatomicabsorptionspectrometricmethod
【原文标准名称】:铁矿石.镍的测定.火焰原子吸收光谱法
【标准号】:ISO15633-2009
【标准状态】:现行
【国别】:国际
【发布日期】:2009-01
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC102
【标准类型】:()
【标准水平】:()
【中文主题词】:原子吸收分光光度测定法;化学分析和试验;测定;含量测定;FAAS方法;燃烧原子吸收光谱测定法;铁矿石;金属矿;矿物;镍;矿石;抽样方法
【英文主题词】:Atomicabsorptionspectrophotometry;Chemicalanalysisandtesting;Determination;Determinationofcontent;FAASmethods;Flameatomicabsorptionspectrometry;Ironores;Metalliferousminerals;Minerals;Nickel;Ores;Samplingmethods
【摘要】:
【中国标准分类号】:D31
【国际标准分类号】:73_060_10
【页数】:13P;A4
【正文语种】:英语