BS EN ISO 11215-1998 改良淀粉.乙酰二淀粉己二酸酯中己二酸含量的测定.气相色谱法
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【英文标准名称】:Modifiedstarch.Determinationofadipicacidcontentofacetylateddi-starchadipates.Gas-chromatographicmethod
【原文标准名称】:改良淀粉.乙酰二淀粉己二酸酯中己二酸含量的测定.气相色谱法
【标准号】:BSENISO11215-1998
【标准状态】:现行
【国别】:英国
【发布日期】:1998-07-15
【实施或试行日期】:1998-07-15
【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】:乙酰化作用;酸含量;己二酸酯;己二酸;校准;碳水化合物;化学分析和试验;测定;含量测定;食品;气相色谱法;实验室间试验;数学计算;方法;修正的;精密度;定量分析;再现性;抽样方法;淀粉;统计方法分析;滴定法;容量分析
【英文主题词】:Acetylation;Acidcontent;Adipates;Adipicacid;Calibration;Carbohydrates;Chemicalanalysisandtesting;Determination;Determinationofcontent;Foodproducts;Gaschromatography;Inter-laboratorytests;Mathematicalcalculations;Methods;Modified;Precision;Quantitativeanalysis;Reproducibility;Samplingmethods;Starches;Statisticalmethodsofanalysis;Titration;Volumetricanalysis
【摘要】:ThisInternationalStandardspecifiesamethodforthegaschromatographicdeterminationoftotaladipiccontentandfreeadipicacidcontentofacetylateddi-starchadipates.
【中国标准分类号】:X11
【国际标准分类号】:67_180_20
【页数】:20P.;A4
【正文语种】:英语
【英文标准名称】:Opticalfibres-Measurementmethodsandtestprocedures-Chromaticdispersion
【原文标准名称】:光纤.测量方法和试验规程.色散
【标准号】:BSEN60793-1-42-2007
【标准状态】:现行
【国别】:英国
【发布日期】:2007-07-31
【实施或试行日期】:2007-07-31
【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】:光缆;色散;尺寸规格;频散;电气工程;包络时延;纤维光学;光纤;玻璃纤维光缆;玻璃纤维;梯度纤维;测量;测量技术;单模纤维;多模纤维;光波导;光电子学;性能;规范(验收);测试;测试装置
【英文主题词】:Cables;Chromaticdispersion;Dimensions;Dispersion(waves);Electricalengineering;Envelopedelay;Fibreoptics;Glassfibrecables;Glassfibres;Gradientfibres;Measurement;Measuringtechniques;Monomodefibres;Multimodefibres;Opticalwaveguides;Optoelectronics;Properties;Specification(approval);Testing;Testingdevices
【摘要】:ThispartofIEC60793establishesuniformrequirementsformeasuringthechromaticdispersionofopticalfibre,therebyassistingintheinspectionoffibresandcablesforcommercialpurposes.Chromaticdispersionvarieswithwavelength.Somemethodsandimplementationsmeasurethegroupdelayasafunctionofwavelengthandthechromaticdispersionanddispersionslopearededucedfromthederivatives(withrespecttowavelength)ofthisdata.Thisdifferentiationismostoftendoneafterthedataarefittedtoamathematicalmodel.Otherimplementationscanallowdirectmeasurement(ofthechromaticdispersion)ateachoftherequiredwavelengths.Forsomecategoriesoffibre,thechromaticdispersionattributesarespecifiedwiththeparametersofaspecificmodel.Inthesecases,therelevantrecommendationorstandarddefinesthemodelappropriateforthedefinitionofthespecifiedparameters.Forotherfibrecategories,thedispersionisspecifiedtobewithinagivenrangeforoneormorespecifiedwavelengthintervals.Inthelattercase,eitherdirectmeasurementsmaybemadeatthewavelengthextremesorsomefittingmodelmaybeusedtoalloweithergroupdelaymeasurementmethodsorimplementationsorstorageofareducedsetofparametersthatmaybeusedtocalculatetheinterpolateddispersionforparticularwavelengthswhichmaynothaveactualdirectmeasurementvalues.AnnexEgivesageneraldescriptionofchromaticdispersionfittingandoutlinesanumberoffittingequationssuitableforusewithanyofthemeasurementmethodsorfibrecategories.Thisstandardgivesfourmethodsformeasuringchromaticdispersion:–methodA:phaseshift;–methodB:spectralgroupdelayinthetimedomain;–methodC:differentialphaseshift;–methodD:interferometry.MethodsA,B,andCapplytothemeasurementofchromaticdispersionofthefollowingfibresoveraspecifiedwavelengthrange:–classA1graded-indexmultimodefibres;–categoryA4f,A4gandA4hmultimodefibres;–classBsingle-modefibres(allcategories).MethodDappliestothemeasurementofchromaticdispersionvaluesofsingle-modefibrescategoriesB1,B2,B4andB5overthe1000nmto1700nmwavelengthrange.Themethodscanbeappliedtolaboratory,factoryandfieldmeasurementsofchromaticdispersion,andthewavelengthrangeofthemeasurementscanbetailoredasrequired.MeasurementsaremadeattemperatureasstatedinIEC60793-1-1,Table1–Standardrangeofatmosphericconditions(Temperature23°C±5°C).Themethodsaresuitableforfibreorcablelengthsgreaterthan1km.Theymayalsobeappliedtoshorterlengths,butaccuracyandrepeatabilitymaybecompromised.MethodDisthepreferredmethodforshorterpiecefibres(1mto10m).InformationcommontoallmethodsiscontainedinClauses1-8,andinformationpertainingtoeachindividualmethodappearsinAnnexesA,B,C,andD,respectively.
【中国标准分类号】:M33
【国际标准分类号】:33_180_10
【页数】:34P.;A4
【正文语种】:英语
【英文标准名称】:Standardization;presentationofstandards;designationofstandardizeditems
【原文标准名称】:标准化工作.标准编制.标准化对象图例
【标准号】:DIN820-27-1987
【标准状态】:作废
【国别】:德国
【发布日期】:1987-02
【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】:标准;设计;定单;名称与符号;标准化;定义;标准化参数
【英文主题词】:standardization;standards;design;designations;standardizedparameters;orders(salesdocuments);definitions
【摘要】:
【中国标准分类号】:A00
【国际标准分类号】:01_120
【页数】:4P;A4
【正文语种】:德语