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【英文标准名称】:TestMethodforAcidNumberofPetroleumProductsbyPotentiometricTitration
【原文标准名称】:电位滴定法测定石油产品酸值的试验方法
【标准号】:ANSI/ASTMD664-2007
【标准状态】:作废
【国别】:美国
【发布日期】:2007
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:酸值;石油产品
【英文主题词】:Acidnumber;Lubricants;Petroleumproducts;Potentiometricanalysis;Potentiometricmethods;Testing
【摘要】:Thistestmethodcoversproceduresforthedeterminationofacidicconstituentsinpetroleumproductsandlubricantssolubleornearlysolubleinmixturesoftolueneandpropan-2-ol.Itisapplicableforthedeterminationofacidswhosedissociationconstantsinwaterarelargerthan10;extremelyweakacidswhosedissociationconstantsaresmallerthan10donotinterfere.Saltsreactiftheirhydrolysisconstantsarelargerthan10.Therangeofacidnumbersincludedintheprecisionstatementis0.1mg/gKOHto150mg/gKOH.Note1Innewandusedoils,theconstituentsthatmaybeconsideredtohaveacidiccharacteristicsincludeorganicandinorganicacids,esters,phenoliccompounds,lactones,resins,saltsofheavymetals,saltsofammoniaandotherweakbases,acidsaltsofpolybasicacids,andadditionagentssuchasinhibitorsanddetergents.Thetestmethodmaybeusedtoindicaterelativechangesthatoccurinoilduringuseunderoxidizingconditionsregardlessofthecolororotherpropertiesoftheresultingoil.Althoughthetitrationismadeunderdefiniteequilibriumconditions,thetestmethodisnotintendedtomeasureanabsoluteacidicpropertythatcanbeusedtopredictperformanceofoilunderserviceconditions.Nogeneralrelationshipbetweenbearingcorrosionandacidnumberisknown.Note2TheacidnumberobtainedbythisstandardmayormaynotbenumericallythesameasthatobtainedinaccordancewithTestMethodsD974andD3339.Therehasnotbeenanyattempttocorrelatethismethodwithothernon-titrationmethods.Note3AfewlaboratorieshavemadetheobservationthatthereisadifferenceinTestMethodD664resultswhenaqueousversusnonaqueousbuffersareused.hevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:E30
【国际标准分类号】:75_080
【页数】:
【正文语种】:英语


【英文标准名称】:Photography.Blackandwhitecontinuoustonepapers.DeterminationofISOspeedandISOrangeforprinting
【原文标准名称】:摄影技术.黑白连续色调相纸.印相用ISO感光度和宽容度的测定
【标准号】:BSISO6846-1992
【标准状态】:作废
【国别】:英国
【发布日期】:1995-12-15
【实施或试行日期】:
【发布单位】:英国标准学会(BSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:额定值;摄影材料;单色摄影;相纸;感光测定;曝光时间;作标记;胶片感光度;准确度;印片(摄影);摄影;纸
【英文主题词】:paper;accuracy;printing(photography);photography;filmspeeds;ratings;photographicmaterials;marking;sensitometry;monochromephotography;photographicpaper;exposuretime
【摘要】:ThisInternationalStandardspecifiesthemethodfordeterminingtheISOspeedandISOrangeofblack-and-whitephotographicpapersusedtomakepositivereflectionprintsofcontinuous-tonesubjectsfromblack-and-whitefilmnegatives.Itpertainstoallcon-ventionalsilver-halidecontactandenlargingpapersusedforcontinuous-toneorpictorialphotography.Thisincludespaperswithvariablecontrast.Thepa-persmaybeprocessedinconventionalchemicalsandequipment,butalsousingspecialproceduressuchasthoseinvolvingactivatorsorheatfordevelopment.ThisInternationalStandarddoesnotapplyto:a)non-silverpapers;b)highcontrastsilverpapers,suchasthoseusedinthegraphicarts,orothernon-pictorialapplications;c)silverpapersusedtoobtainadirectpositiveorreversalimage.
【中国标准分类号】:G81
【国际标准分类号】:
【页数】:20P;A4
【正文语种】:英语