IEC 49/928/DTS-2010 频率控制,选择和检测用压电,电介质和静电设备以及相关材料.词汇表.第3部分:压电和介质材料.压电和电介质振荡器
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【英文标准名称】:Piezoelectric,dielectricandelectrostaticdevicesandassociatedmaterialsforfrequencycontrol,selectionanddetection-Glossary-Part3:Piezoelectricanddielectricmaterials-Piezoelectricanddielectricoscillators
【原文标准名称】:频率控制,选择和检测用压电,电介质和静电设备以及相关材料.词汇表.第3部分:压电和介质材料.压电和电介质振荡器
【标准号】:IEC49/928/DTS-2010
【标准状态】:作废
【国别】:国际
【发布日期】:2010-10
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/TC49
【标准类型】:()
【标准水平】:()
【中文主题词】:制陶业;组件;定义(术语);介质装置;电气工程;电子设备及元件;频率选择;频率稳定;词汇;振荡器;压电器件;技术术语;术语学;术语标准;词汇表
【英文主题词】:Ceramics;Components;Definitions;Dielectricdevices;Electricalengineering;Electronicequipmentandcomponents;Frequencyselection;Frequencystabilization;Glossaries;Oscillators;Piezoelectricdevices;Technicalterm;Terminology;Terminologystandard;Vocabulary
【摘要】:
【中国标准分类号】:L21
【国际标准分类号】:01_040_31;31_140
【页数】:
【正文语种】:英语
基本信息
| 标准名称： | 核电厂工程建设预算编制方法 |
| 发布部门： | 国家能源局 |
| 发布日期： | 2010-05-01 |
| 实施日期： | 2010-10-01 |
| 首发日期： | |
| 作废日期： | |
| 出版社： | 原子能出版社 |
| 出版日期： | 2010-10-01 |
适用范围
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前言
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引用标准
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所属分类： 冶金 金属理化性能试验方法 金属无损检验方法
【英文标准名称】:StandardTestMethodforDeterminationofFormaldehydeandOtherCarbonylCompoundsinAir(ActiveSamplerMethodology)
【原文标准名称】:测定空气中甲醛和其他羰基化合物的标准试验方法(活性取样法)
【标准号】:ASTMD5197-2009e1
【标准状态】:现行
【国别】:
【发布日期】:2009
【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】:D22.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:活性取样;空气;羰基化合物;二硝基苯肼套筒;甲醛;高效液相色谱分析;高效液相色谱法;活性取样法;空气分析;醛;大气分析
【英文主题词】:activesampler;air;carbonylcompounds;DNPHcartridge;formaldehyde;HPLCanalysis;HPLC(highperformanceliquidchromatography);Activesamplermethodology;Airanalysis;Aldehydes;Atmosphericanalysis
【摘要】:Thistestmethodprovidesananalyticalprocedureformeasuringformaldehydeandothercarbonylcompoundsinindoororoutdoorair.1.1Thistestmethodcoversaprocedureforthedeterminationofformaldehyde(HCHO)andothercarbonylcompounds(aldehydesandketones)inair.Othercarbonylcompoundsthathavebeenvalidatedfordeterminationbythismethodincludeacetaldehyde,acetone,propanal(propionaldehyde),methacrolein,2-butanone(methylethylketone),butyraldehyde,benzaldehyde,isovaleraldehyde,valeraldehyde,o-tolualdehyde,m-tolualdehyde,p-tolualdehyde,hexanal,and2,5-dimethylbenzaldehyde.Acroleinandcrotonaldehydecannotbedeterminedquantitativelyusingtheanalyticalproceduredescribedin10.2duetotheformationofmultiplederivativepeaksandtheinstabilityofthepeakratios.However,theproceduredescribedintheAnnexAhasbeenusedbytheU.S.EnvironmentalProtectionAgencytoestimateacroleinandcrotonaldehydeconcentrationsinstandardatmospheresfollowingspecialprecautions.1.2Thistestmethodinvolvesdrawingairthroughacartridgecontainingsilicagelcoatedwith2,4-dinitrophenylhydrazine(DNPH)reagent.CarbonylcompoundsreadilyformstablederivativeswiththeDNPHreagent.TheDNPHderivativesareanalyzedforparentaldehydesandketonesutilizinghighperformanceliquidchromatography(HPLC).ThesamplingprocedureisamodificationofU.S.EPAMethodTO-11A(see2.2).1.3ThistestmethodisbasedonthespecificreactionofcarbonylcompoundswithDNPHinthepresenceofanacidtoformstablederivativesaccordingtothereactionshowninFig.1,(where:bothRandR1arealkyloraromaticgroups(ketones),orboth,oreitherRorR1isahydrogenatom(aldehydes)).Thedeterminationofformaldehydeandothercarbonylcompounds,asDNPHderivatives,issimilartothatofU.S.EPAMethodTO-11AinthatitutilizesHPLCwithUVdetectionastheanalyticalfinish.ThedetectionlimitshavebeenextendedtoothercarbonylcompoundsthatcanbedeterminedasoutlinedinSection10.2.4.Thistestmethodissuitablefordeterminationofformaldehydeandothercarbonylcompoundsintheconcentrationrangefromapproximately10ppbto1ppm(v/v).1.4Thesamplingmethodgivesatime-weightedaverage(TWA)sample.Itcanbeusedforlong-term(1to24h)orshort-term(5to60min)samplingofairforformaldehyde.1.5ThistestmethodinstructstheuseronhowtopreparesamplingcartridgesfromcommerciallyavailablechromatographicgradesilicagelcartridgesbytheapplicationofacidifiedDNPHtoeachcartridge.1.6Thesamplingflowrate,asdescribedinthistestmethod,hasbeenvalidatedforsamplingratesupto1.5L/min.Thisflowratelimitationisprincipallyduetothehighpressuredrop(>8kPaat1.0L/min)acrosstheuserpreparedsilicagelcartridgeswhichhaveaparticlesizeof55to105x03BC;m.Thesecartridgesarenotgenerallycompatiblewithbattery-poweredpumpsusedinpersonalsamplingequipment(forexample,thoseusedbyindustrialhygienists.1.7Alternatively,pre-coatedDNPHsilicagelcartridgesarealsocommerciallyavailableandmaybesubstitutedprovidedtheycanbedemonstratedtoperformequivalently.Someoftheseusesilicagelofalargerparticlesizethatresultsinalowerpressuredropacrossthecartridge.Theselowpressuredropcartridgesmaybemoresuitableforsamplingairusingbattery-poweredpersonalsamplingpumps.1.8ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.9Thisstandarddoesnotpurporttoa......
【中国标准分类号】:C51
【国际标准分类号】:71_080_80
【页数】:16P.;A4
【正文语种】:
