基本信息
标准名称: | 煤中铬、镉、铅的测定方法 |
英文名称: | Determination of chromium, cadmium and lead in coal |
中标分类: |
矿业 >>
固体燃料矿 >>
煤炭分析方法 |
ICS分类: |
采矿和矿产品 >>
煤
|
替代情况: | 被GB/T 16658-2007代替 |
发布部门: | 国家技术监督局 |
发布日期: | 1996-12-19 |
实施日期: | 1997-07-01 |
首发日期: | 1996-12-19 |
作废日期: | 2008-06-01 |
主管部门: | 中国煤炭工业协会 |
提出单位: | 中华人民共和国煤炭工业部 |
归口单位: | 全国煤炭标准化技术委员会 |
起草单位: | 煤炭科学研究总院北京煤化学 |
起草人: | 张传智、吴富贤、姜金海 |
出版社: | 中国标准出版社 |
出版日期: | 1997-07-01 |
页数: | 平装16开, 页数:6, 字数:6千字 |
书号: | 155066.1-13807 |
适用范围
本标准规定了测定煤中铬、镉、铅的方法提要、试剂、仪器设备、操作步骤、结果表达及精密度。本标准适用于褐煤、烟煤和无烟煤。
前言
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目录
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引用标准
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所属分类: 矿业 固体燃料矿 煤炭分析方法 采矿和矿产品 煤
【英文标准名称】:StandardTestMethodforAcidNumberofPetroleumProductsbyPotentiometricTitration
【原文标准名称】:用电位滴定法测定石油产品酸值的标准试验方法
【标准号】:ASTMD664-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:D02.06
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:酸值;润滑剂;石油产品;电势分析法;电位测量法;测试
【英文主题词】:acidnumber;lubricants;petroleumproducts;potentiometric;strongacidnumber;titration
【摘要】:Newandusedpetroleumproductsmaycontainacidicconstituentsthatarepresentasadditivesorasdegradationproductsformedduringservice,suchasoxidationproducts.Therelativeamountofthesematerialscanbedeterminedbytitratingwithbases.Theacidnumberisameasureofthisamountofacidicsubstanceintheoil,alwaysundertheconditionsofthetest.Theacidnumberisusedasaguideinthequalitycontroloflubricatingoilformulations.Itisalsosometimesusedasameasureoflubricantdegradationinservice.Anycondemninglimitsmustbeempiricallyestablished.Sinceavarietyofoxidationproductscontributetotheacidnumberandtheorganicacidsvarywidelyincorrosionproperties,thetestmethodcannotbeusedtopredictcorrosivenessofoilunderserviceconditions.Nogeneralcorrelationisknownbetweenacidnumberandthecorrosivetendencyofoilstowardmetals.1.1Thistestmethodcoversproceduresforthedeterminationofacidicconstituentsinpetroleumproductsandlubricantssolubleornearlysolubleinmixturesoftolueneandpropan-2-ol.Itisapplicableforthedeterminationofacidswhosedissociationconstantsinwaterarelargerthan10-9;extremelyweakacidswhosedissociationconstantsaresmallerthan10-9donotinterfere.Saltsreactiftheirhydrolysisconstantsarelargerthan10-9.Therangeofacidnumbersincludedintheprecisionstatementis0.1mg/gKOHto150mg/gKOH.Note1Innewandusedoils,theconstituentsthatmaybeconsideredtohaveacidiccharacteristicsincludeorganicandinorganicacids,esters,phenoliccompounds,lactones,resins,saltsofheavymetals,saltsofammoniaandotherweakbases,acidsaltsofpolybasicacids,andadditionagentssuchasinhibitorsanddetergents.1.2Thetestmethodmaybeusedtoindicaterelativechangesthatoccurinoilduringuseunderoxidizingconditionsregardlessofthecolororotherpropertiesoftheresultingoil.Althoughthetitrationismadeunderdefiniteequilibriumconditions,thetestmethodisnotintendedtomeasureanabsoluteacidicpropertythatcanbeusedtopredictperformanceofoilunderserviceconditions.Nogeneralrelationshipbetweenbearingcorrosionandacidnumberisknown.Note2TheacidnumberobtainedbythisstandardmayormaynotbenumericallythesameasthatobtainedinaccordancewithTestMethodsD974andD3339.Therehasnotbeenanyattempttocorrelatethismethodwithothernon-titrationmethods.Note3AfewlaboratorieshavemadetheobservationthatthereisadifferenceinTestMethodD664resultswhenaqueousversusnonaqueousbuffersareused.1.3hevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:E30
【国际标准分类号】:75_080;75_080;75_080;75_080;75_080
【页数】:8P.;A4
【正文语种】: