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ASTM E1657-1998(2006) 液相色谱用可变波长光度探测器试验的标准规程

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【英文标准名称】:StandardPracticeforTestingVariable-WavelengthPhotometricDetectorsUsedinLiquidChromatography
【原文标准名称】:液相色谱用可变波长光度探测器试验的标准规程
【标准号】:ASTME1657-1998(2006)
【标准状态】:现行
【国别】:
【发布日期】:1998
【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】:E13.19
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:漂移;线性度;变量;液相色谱法;液相色谱法;VWPD可变性;长;短;定期噪声;试验可变性;实施规程;噪声级测量;光度探测器;波长准确度;波长光度探测器;波长光度探测器
【英文主题词】:linearity;noisemeasurement;photometricdetector;variablewavelength;wavelengthaccuracy
【摘要】:Althoughitispossibletoobserveandmeasureeachoftheseveralcharacteristicsofadetectorunderdifferentanduniqueconditions,itistheintentofthispracticethatacompletesetofdetectorspecificationsshouldbeobtainedunderthesameoperatingconditions.Itshouldalsobenotedthattocompletelyspecifyadetectorrsquo;capability,itsperformanceshouldbemeasuredatseveralsetsofconditionswithintheusefulrangeofthedetector.Thetermsandtestsdescribedinthispracticearesufficientlygeneralthattheymaybeusedregardlessoftheultimateoperatingparameters.Linearityandresponsetimeoftherecorderorotherreadoutdeviceusedshouldbesuchthattheydonotdistortorotherwiseinterferewiththeperformanceofthedetector.Thisrequiresadjustingthegain,damping,andcalibrationinaccordancewiththemanufacturerrsquo;directions.Ifadditionalelectronicfiltersoramplifiersareusedbetweenthedetectorandthefinalreadoutdevice,theircharacteristicsshouldalsofirstbeestablished.1.1Thispracticecoversthetestingoftheperformanceofavariable-wavelengthphotometricdetector(VWPD)usedasthedetectioncomponentofaliquid-chromatographic(LC)systemoperatingatoneormorewavelengthsintherange190to800nm.Manyofthemeasurementsaremadeat254nmforconsistencywithPracticeE685.Measurementsatotherwavelengthsareoptional.1.2Thispracticeisintendedtodescribetheperformanceofthedetectorbothindependentlyofthechromatographicsystem(staticconditions)andwithflowingsolvent(dynamicconditions).1.3Forgeneralliquidchromatographicprocedures,consultRefs(1-9).1.4Forgeneralinformationconcerningtheprinciples,construction,operation,andevaluationofliquid-chromatographydetectors,seeRefs(10,11)inadditiontothesectionsdevotedtodetectorsinRefs(1-7).1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:N34
【国际标准分类号】:71_040_50
【页数】:8P.;A4
【正文语种】:


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基本信息
标准名称:香料 黄樟油素含量的测定 冻点法
英文名称:Aromatics. Determination of safrole cotent . Freezing point method
中标分类: 轻工、文化与生活用品 >> 日用化工品 >> 香精、香料
ICS分类: 化工技术 >> 化工产品 >> 香精油
替代情况:替代QB 812-1981;被GB/T 14454.7-2008代替
发布部门:国家技术监督局
发布日期:1993-06-05
实施日期:1994-01-01
首发日期:1993-06-05
作废日期:2008-11-01
主管部门:中国轻工业联合会
提出单位:中华人民共和国轻工业部
归口单位:全国香料标准化中心
起草单位:轻工业部香料工业科学研究所
起草人:徐易、黄振卿、万馥磐
出版社:中国标准出版社
出版日期:1994-01-01
页数:2页
适用范围

本标准规定了用冻点法测定黄樟油素含量的方法。
本标准适用于对黄樟油素含量为69%以上的精油及单离香料的测定.

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所属分类: 轻工 文化与生活用品 日用化工品 香精 香料 化工技术 化工产品 香精油
【英文标准名称】:Reciprocatinginternalcombustionengines-Safetyrequirementsfordesignandconstructionofenginesforuseinpotentiallyexplosiveatmospheres-GroupIIenginesforuseinflammablegasandvapouratmospheres
【原文标准名称】:往复式内燃发动机.用在潜在爆炸性环境下发动机结构和设计用安全要求.用于可燃气体和蒸气环境的II组发动机
【标准号】:BSEN1834-1-2000
【标准状态】:现行
【国别】:英国
【发布日期】:2000-04-15
【实施或试行日期】:2000-04-15
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:建筑工程;定义;设计;发动机结构;爆炸性环境;可燃性环境;大气;危害;内燃机;机械工程;电动机;往复式发动机;往复式内燃机;安全;安全要求
【英文主题词】:Constructions;Definition;Definitions;Design;Engineconstruction;Explosiveatmospheres;Flammableatmospheres;Gasatmosphere;Hazards;Internalcombustionengines;Mechanicalengineering;Motors;Reciprocatingengines;Reciprocatinginternalcombustionengines;Safety;Safetyrequirements
【摘要】:ThisEuropeanStandardspecifiesthesafetyrequirementsand/ormeasurestoremovethehazardsandlimittherisksonreciprocatinginternalcombustioncompressionignitionengineshereinafterreferredtoas'engines'ofgroupⅡcategories2and3foruseinpotentiallyexplosiveatmospheresofflammablegasandvapour.ThisEuropeanStandarddoesnotapplytoflammablegasandvapouratmospherescontainingcarbondisulphide(CS2).ThisEuropeanStandarddoesnotdefinerequirementsrelatingtothedrivenmachinery.Theserequirementscanbefoundintheappropriateapplicationstandards.ThisEuropeanstandarddoesnotapplytoenginesusedinpremisesfortheprocessingmanufactureorstorageofexplosives.ThesafetyrequirementsforenginesforuseinpotentiallyexplosiveatmospheresforundergroundapplicationsaregiveninEN1834-2:2000.ThesafetyrequirementsforenginesforusedinexplosiveatmosphereswithcombustibledustaregiveninEN1834-3:2000.ThisEuropeanStandarddoesnotapplytosparkignitionengines.Thehazardsapplicablearelistedinclause4andrelatetotheadditionalhazardsofoperationinanatmospherethatmaybecomeexplosive.Thetestswhichtheengineanditsancillaryfittingsarerequiredtoundergotoverifycompliancewiththisspecificationaredetailedinthisstandard.Generalsafetyrequirementsi.e.thosecommontoallRICengines,arecoveredinEN1679-1:1998.ThisEuropeanStandardisapplicabletoengineswhicharemanufacturedafterthedateofissueofthisstandard.
【中国标准分类号】:J90
【国际标准分类号】:13_230;27_020
【页数】:40P;A4
【正文语种】:英语