【英文标准名称】:Lockwashers(Inchseries)
【原文标准名称】:英制锁紧垫圈
【标准号】:ASMEB18.21.1-1999
【标准状态】:现行
【国别】:美国
【发布日期】:1999
【实施或试行日期】:
【发布单位】:美国机械工程师协会(ASME)
【起草单位】:ASME
【标准类型】:()
【标准水平】:()
【中文主题词】:齿形垫圈;垫圈;锁紧垫圈;物理性能;螺旋弹簧;锁紧装置;试验;尺寸;锁定装置及定位装置
【英文主题词】:Dimensions;Helicalsprings;Lockwashers;Lockingandlocatingdevices;Lockingdevices;Physicalproperties;Testing;Toothwashers;Washers
【摘要】:
【中国标准分类号】:J13
【国际标准分类号】:21_060_30
【页数】:25P;A4
【正文语种】:英语


【英文标准名称】:Petroleumproducts-Determinationofsulfurcontent-Wavelength-dispersiveX-rayfluorescencespectrometry
【原文标准名称】:石油制品.硫含量的测定.波长色散X-射线荧光光谱法
【标准号】:ISO14596-2007
【标准状态】:现行
【国别】:国际
【发布日期】:2007-09
【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/TC28
【标准类型】:()
【标准水平】:()
【中文主题词】:分析;化学分析和测试;化合物;含量测定;测定程序;荧光测定法;燃料;质量浓度;材料测试;矿物油;石油产品;参考曲线;光谱化学分析;光谱测定法;硫;硫含量;试验设备;测试;全硫;波长色散;X射线荧光光谱法
【英文主题词】:Analysis;Calibration;Chemicalanalysisandtesting;Chemicals;Determinationofcontent;Determinationprocedures;Fluorimetry;Fuels;Massconcentration;Materialstesting;Mineraloils;Petroleumproducts;Referencecurve;Samplepreparation;Samplingmethods;Spectrochemicalanalysis;Spectrometry;Sulphur;Sulphurcontent;Testequipment;Testing;Totalsulphur;Wavelengthdispersive;X-rayfluorescence;X-rayfluorescencespectrometry
【摘要】:ThisInternationalStandardspecifiesamethodforthedeterminationofthesulfurcontentofliquidpetroleumproducts,additivesforpetroleumproducts,andsemi-solidandsolidpetroleumproductsthatareeitherliquefiedbymoderateheatingorsolubleinorganicsolvents(see4.1)ofnegligibleoraccuratelyknownsulfurcontent.Themethodisapplicabletoproductsoradditiveshavingsulfurcontentsintherange0,001%(m/m)to2,5%(m/m);highercontentscanbedeterminedbyappropriatedilution.Otherelementsdonotinterfereatconcentrationsanticipatedinthematerialssubjecttothisanalysis.NOTEForthepurposesofthisInternationalStandard,term"%(m/m)"isusedtorepresentthemassfractionofamaterial.Highconcentrationsofphosphorusorchlorine[typicallyabove3%(m/m)]cancausebiasinthesulfurresultbyabsorbingZr-LαandS-Kαtodifferentextents.Itisnecessaryinthesecasestocarryoutstudiestodeterminewhetherthispotentialinterferenceissignificant.Whenlargeramountsofmolybdenumarepresent(typicallyabove50mg/kgto100mg/kg),increasedbackgroundradiationandspectraloverlapwiththesulfursignalcanoccur.Itisnecessaryinthesecasestoinspecttherelevantspectralregions,forexample,toinvestigatethesignificanceofthispotentialsourceofbias.
【中国标准分类号】:E30
【国际标准分类号】:75_080
【页数】:8P;A4
【正文语种】:英语