【英文标准名称】:StandardPracticeforCalibrationofTemperatureScaleforThermogravimetry
【原文标准名称】:热解重量测定用温标校准的标准实施规程
【标准号】:ASTME1582-2004
【标准状态】:现行
【国别】:
【发布日期】:2004
【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】:E37.01
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:实施规程;校正;试验;跌落试验;温度;仪表刻度
【英文主题词】:CuriePointstandards;magnetictransitionstandards;meltingpointstandards;temperaturecalibration;thermogravimetry
【摘要】:Thermogravimetricanalyzersareusedtocharacterizeabroadrangeofmaterials.Inmostcases,oneofthedesiredvaluestobeassignedinthermogravimetricmeasurementsisthetemperatureatwhichsignificantchangesinspecimenmassoccur.Therefore,thetemperatureaxis(abscissa)ofallapparent-mass-changecurvesmustbecalibratedaccurately,eitherbydirectreadingofatemperaturesensor,orbyadjustingtheprogrammertemperaturetomatchtheactualtemperatureoverthetemperaturerangeofinterest.Inthelattercase,thisisaccomplishedbytheuseofeithermeltingpointormagnetictransitionstandards.Thispracticepermitsinterlaboratorycomparisonandintralaboratorycorrelationofinstrumentaltemperaturescaledata.1.1Thispracticedescribethetemperaturecalibrationofthermogravimetricanalyzersoverthetemperaturerangefrom25to1500176;Candisapplicabletocommercialandcustom-builtapparatus.Thiscalibrationmaybeaccomplishedbytheuseofeithermeltingpointstandardsormagnetictransitionstandards.1.2Themasschangecurveinthermogravimetryresultsfromanumberofinfluences,someofwhicharecharacteristicofthespecimenholderassemblyandatmosphereratherthanthespecimen.Thevariationsfrominstrumenttoinstrumentoccurinthepointofmeasurementofthetemperature,thenatureofthematerial,itssizeandpacking,thegeometryandcompositionofthespecimencontainer,thegeometryanddesignofthefurnace,andtheaccuracyandsensitivityofthetemperaturesensoranddisplayingscales.Theseallcontributetodifferencesinmeasuredtemperatures,whichmayexceed20176;C.Inaddition,somesampleholderassemblieswillshowvariationsofmeasuredtemperaturewithsamplesizeorheating/coolingrate,orboth.Sinceitisneitherpracticalnoradvisabletostandardizesampleholdersorthermobalancegeometries,instrumentsmaybecalibratedbymeasurementofthedeviationofameltingormagnetic(CuriePoint)transitiontemperaturefromthestandardreferencetemperature.Thisdeviationcanbeappliedasacorrectiontermtosubsequentmeasurements.1.3Thispracticeassumesthattheindicatedtemperatureoftheinstrumentislinearovertherangedefinedbyatwo-pointcalibrationandthatthislinearityhasbeenverified.Thesetwocalibrationtemperaturesshouldbeasclosetotheexperimentalmeasurementstobemadeaspossible.1.4Thispracticedescribesthreeproceduresfortemperaturecalibrationofthermogravimetricanalyzersusinganytypebalance.ProceduresAandBusemeltingpointstandardswithverticalandhorizontalbalances.ProcedureCusesmagnetictransitionstandardsforcalibration.ProcedureAisdesignedspecificallyforusewithhorizontal-typebalancesusingexternalfurnaces.ProcedureBisdesignedspecificallyforusewithverticalhang-downbalancesusingeitherinternalorexternalfurnaces.Noprocedureisrestrictedtotheuseofthefurnacetypedescribedinthatprocedure.1.5Computerorelectronic-basedinstruments,techniques,ordatatreatmentequivalenttothisproceduremaybeused.Note18212;Sinceallelectronicdatatreatmentsarenotequivalent,theusershallverifyequivalencypriortouse.1.6Thedatageneratedbytheseprocedurescanbeusedtocorrectthetemperaturescaleoftheinstrumentbyeitherapositiveornegativeamountusingeitheratwo-pointtemperaturecalibrationprocedureoramulti-pointtemperaturecalibrationwithbestlinefitforthegenerateddata.Note28212;Asingle-pointcalibrationmaybeusedwherethisistheonlyprocedurepossibleorpractical.Theuseofasingle-pointprocedureisnotrecommended.1.7SIunitsarestandard.1.8ThispracticeisrelatedtoISO11358butprovidesinformationandmethodsnotfoundinISO11358.1.9Thisstandarddoesnotpurporttoad......
【中国标准分类号】:N11
【国际标准分类号】:17_200_20
【页数】:9P.;A4
【正文语种】:
基本信息
标准名称: | 鳞球茎花卉检疫规程 |
英文名称: | Phytosanitary rule of floral bulbs and tubers |
中标分类: |
农业、林业 >>
植物保护 >>
植物检疫、病虫害防治 |
ICS分类: |
农业 >>
农业和林业 >>
农业和林业综合
|
发布部门: | 中华人民共和国国家质量监督检验检疫总局 中国国家标准化管理委员会 |
发布日期: | 2011-12-30 |
实施日期: | 2012-06-01 |
首发日期: | 2011-12-30 |
作废日期: | |
主管部门: | 全国植物检疫标准化技术委员会(SAC/TC 271) |
提出单位: | 全国植物检疫标准化技术委员会(SAC/TC 271) |
归口单位: | 全国植物检疫标准化技术委员会(SAC/TC 271) |
起草单位: | 中华人民共和国云南出入境检验检疫局、中国检验检疫科学研究院、中华人民共和国天津出入境检验检疫局 |
起草人: | 蒋小龙、杜宇、李明福、陈云勇、白松、黄国明 |
出版社: | 中国标准出版社 |
出版日期: | 2012-06-01 |
页数: | 12页 |
适用范围
本标准规定了鳞球茎花卉的风险分析、检疫审批、基地备案、进境要求、报检、现场检疫、实验室检验、隔离检疫、检疫监督管理、检疫结果评定和处理等程序。
本标准适用于鳞球茎花卉。
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所属分类: 农业 林业 植物保护 植物检疫 病虫害防治 农业 农业和林业 农业和林业综合