【英文标准名称】:StandardTestMethodforMercurySamplingandAnalysisinNaturalGasbyAtomicFluorescenceSpectroscopy
【原文标准名称】:通过原子荧光光谱学对天然气中汞的取样和分析的标准试验方法
【标准号】:ASTMD6350-1998(2003)
【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】:D03.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:天然气;原子荧光光谱学;金吸着剂;汞取样
【英文主题词】:atomicfluorescencespectroscopy;goldsorbent;mercurysampling;naturalgas
【摘要】:Thistestmethodcanbeusedtodeterminethetotalmercuryconcentrationofanaturalgasstreamdownto0.001x03BC;g/m3.Itcanbeusedtoassesscompliancewithenvironmentalregulations,predictpossibledamagetogasplantequipment,andmonitortheefficiencyofmercuryremovalbeds.Thepreferredsamplingmethodformercurycollectionisonsupportedgoldsorbent,whichallowstheelementtobetrappedandextractedfromtheinterferingmatrixofthegas.Thermaldesorptionofmercuryisperformedbyraisingthetemperatureofthetrapbymeansofanichromewirecoiledaroundit.SinceAFSdemonstrateslowerdetectionlimitsapproaching0.1pg,thistestmethodavoidsdifficultiesassociatedwithprolongedsamplingtime.Saturationofthetrapwithinterferantssuchashydrogensulfide(H2S)isavoided.Averagesamplingcanrangebetween15to30min,orless.1.1Thistestmethodcoversthedeterminationoftotalmercuryinnaturalgasstreamsdownto0.001956;g/m3.Itincludesprocedurestobothobtainingarepresentativesampleandtheatomicfluorescencedetectionoftheanalyte.Thisprocedurecanbeappliedforbothorganicandinorganicmercurycompounds.1.2Both,inch-poundandSI(metric)unitsofmeasurementareusedthroughoutthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortoitsuse.
【中国标准分类号】:E24
【国际标准分类号】:
【页数】:6P.;A4
【正文语种】:


【英文标准名称】:Acoustics-Referencezeroforthecalibrationofaudiometricequipment-Part1:Referenceequivalenttresholdsoundpressurelevelsforpuretonesandsupra-auralearphones(ISO389-1:1998);GermanversionENISO389-1:2000
【原文标准名称】:声学.校正听力设备的基准零级.第1部分:纯音和压耳式耳机用的基准等效阈声压级
【标准号】:DINENISO389-1-2000
【标准状态】:现行
【国别】:德国
【发布日期】:2000-09
【实施或试行日期】:2000-09-01
【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】:听力测定;粘土;校正;电气工程;声学;水准仪;声压;声学性质和声学现象;声压级;头戴送受话器;参考级;仪器;测量技术;声强;听力计;定义;声信号;耳机;纯普听力图
【英文主题词】:
【摘要】:Thedocumentspecifiesastandardreferencezeroforthescaleofhearingtresholdlevelapplicabletopure-toneairconductionaudiometers,inordertopromoteagreementanduniformityintheexpressionofhearingtresholdlevelmeasurementsthroughouttheworld.Itstatestheinformationinaformsuitablefordirectapplicationtothecalibrationofaudiometers,thatis,intermsoftheresponseoftwodifferentstandardmodelsofearphonemeasuredonacouplercomplyingwithIEC60303andintermsofothersupra-auralearphonesofmodelsspecifiedin4.3measuredonanaritficialearcomplyingwithIEC60318.#,,#
【中国标准分类号】:N65
【国际标准分类号】:13_140
【页数】:10P;A4
【正文语种】:德语