NF V05-323-1995 茶叶和固体速溶茶.咖啡因含量的测定.高效液相色谱法

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【英文标准名称】:StandardTestMethodforDeterminingWaterSeparationCharacteristicsofKerosine-TypeAviationTurbineFuelsContainingAdditivesbyPortableSeparometer
【原文标准名称】:便携式分离仪测定含添加剂的煤油型航空涡轮机燃料脱水性能标准试验方法
【标准号】:ASTMD7224-2008
【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.J0
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:additives;aviationturbinefuel;coalescence;jetfuel;micro-separometer;MSEPrating;surfactant;waterseparation;Additives;Aviationturbinefuels;Kerosine;Portableseparometer;Separationprocessing/analysis
【摘要】:Thistestmethodprovidesameasurementofthepresenceofsurfactantsinaviationturbinefuels.LikepreviousobsoleteTestMethodsD2550andD3602andcurrentTestMethodD3948,thistestmethodcandetecttraceamountsofrefinerytreatingchemicalsinfuel.Thetestmethodscanalsodetectsurfaceactivesubstancesaddedtofuelintheformofadditivesorpickedupbythefuelduringhandlingfrompointofproductiontopointofuse.Someofthesesubstancesdegradetheabilityoffilterseparatorstoseparatefreewaterfromthefuel.Thistestmethodyieldsapproximatelythesame(low)MSEPratingsasTestMethodD3948forfuelsthatcontainstrongsurfactants.ThistestmethodwillgiveapproximatelythesameMSEPratingsforJetA,JetA-1,JP-5,JP-7,andJP-8fuelsasTestMethodD3948whentestingreferencefluids.TheMSEPratingsobtainedbythistestmethodarelessaffectedbyweaksurfactantsthanTestMethodD3948.SomewhathigherMSEPratingsforJetA,JetA-1,JP-5,JP-7,andJP-8fuelsareobtainedbythistestmethodthanthoseobtainedbyTestMethodD3948whenadditivessuchasstaticdissipateradditives(SDA)andcorrosioninhibitorsarepresentinthefuel.Thiscorrelateswiththesatisfactoryperformanceoffilterseparatorsforsuchfuels,whenwet.However,thesesameadditivesadverselyaffecttheMSEPratingsobtainedbyTestMethodD3948byerroneouslyindicatingthatsuchadditizedfuelswouldsignificantlydegradetheabilityoffilterseparatorstoseparatefreewaterfromthefuelinactualservice.TheMicro-Separometerhasaneffectivemeasurementrangefrom50to100.Valuesobtainedoutsideofthoselimitsareundefinedandinvalid.Note18212;Intheeventavaluegreaterthan100isobtained,thereisagoodprobabilitythatlighttransmittancewasreducedbymaterial,typicallywater,containedinthefuelthatwasusedtosetthe100referencelevel.Duringthecoalescingportionofthetest,thecontaminatingmaterialaswellasthe50x00B1;1x00B5;Lofdistilledwaterwassubsequentlyremovedduringthisportionofthetest.Thus,theprocessedfuelhadahigherlighttransmittancethanthefuelsampleusedtoobtainthe100referencelevelresultinginthefinalratingmeasuringinexcessof100.1.1Thistestmethodcoversarapidportablemeansforfieldandlaboratoryusetoratetheabilityofkerosine-typeaviationturbinefuels,bothneatandthosecontainingadditives,toreleaseentrainedoremulsifiedwaterwhenpassedthroughfiberglasscoalescingmaterial.1.1.1Thistestmethodisapplicabletokerosine-typeaviationturbinefuelsincluding:JetAandJetA-1(asdescribedinSpecificationD1655);JP-5,JP-7,JP-8,andJP-8+100.(SeeSection6.)1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecificwarningstatements,see8.2-8.5.
【中国标准分类号】:E31
【国际标准分类号】:75_160_20
【页数】:15P.;A4
【正文语种】:英语


【英文标准名称】:Hexagonsocketheadcapscrews(ISO4762:1997);GermanversionENISO4762:1997
【原文标准名称】:内六角圆柱头螺钉
【标准号】:DINENISO4762-1998
【标准状态】:作废
【国别】:德国
【发布日期】:1998-02
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:六角凹头螺钉;紧固件;ISO螺纹;六角内孔;尺寸;螺钉;凸圆头紧固件;尺寸公差;凹头紧固件;规范(验收);凸头螺钉;ISO米制螺纹;米制的;名称与符号;螺纹
【英文主题词】:cheese-headfasteners;dimensions;screws(bolts);fasteners;cheeseheadscrews;threads;isometricthreads;isoscrewthreads;designations;specification(approval);dimensionaltolerances;hexagonsocketsc
【摘要】:
【中国标准分类号】:J13
【国际标准分类号】:21_060_10
【页数】:14P;A4
【正文语种】:德语