SAE AMS3617 Nylon Plastic Moldings and Extrusions
时间:2024-05-14 14:50:43 来源: 标准资料网 作者：标准资料网 阅读：9443
Product Code:SAE AMS3617
Title:Nylon Plastic Moldings and Extrusions
Issuing Committee:Ams P Polymeric Materials Committee
Scope:This specification covers one type of nylon thermoplastic resin in the form of moldings and extrusions.
【英文标准名称】:StandardPracticeforSamplingandCountingAirborneFibers,IncludingAsbestosFibers,inMinesandQuarries,byPhaseContrastMicroscopyandTransmissionElectronMicroscopy
【原文标准名称】:用相位比对显微镜和相位传输显微镜取样和计数矿场和采石场内的空气纤维(包含石棉纤维)的标准实施规程
【标准号】:ASTMD7200-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【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】:D22.04
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:石棉;对比度;计数;电子显微镜;纤维;显微术;矿;相位;露天矿;取样;传输
【英文主题词】:airmonitoring;asbestos;fibers;membranefiltermethod;minesandquarries;phasecontrastmicroscopy;samplingandanalysis
【摘要】:1.1Thispracticedescribesthedeterminationoftheconcentrationoffibers,expressedasthenumberofsuchfiberspermillilitreofair,usingphasecontrastmicroscopyandoptionallytransmissionelectronmicroscopytoevaluateparticulatematerialcollectedonamembranefilterinthebreathingzoneofanindividualorbyareasamplinginaspecificlocation.ThispracticeisbasedonthecoreproceduresprovidedintheInternationalOrganizationforStandardization(ISO)StandardISO8672(1),theNationalInstituteforOccupationalandHealth(NIOSH)ManualofAnalyticalMethods,NIOSH7400(2),andtheOccupationalSafetyandHealthAdministration(OSHA)MethodID160(3).Thispracticeindicatestheimportantpointswherethesemethodsdiffer,andprovidesinformationregardingthedifferences.However,selectingportionsofproceduresfromdifferentpublishedmethodsgenerallyrequiresausertoreportthattheyhaveusedamodificationtoamethodratherthanclaimtheyhaveusedthemethodaswritten.Thispracticefurthergivesguidanceonhowdifferentialcountingtechniquesmaybeusedtoindicatewhereapopulationoffibersmaybeasbestos.1.2Thepracticeisusedforroutinedeterminationofanindexofoccupationalexposuretoairbornefibersinmines,quarries,orotherlocationswhereoremaybeprocessedorhandled.Themethodgivesanindexofairbornefiberconcentration.Themethodprovidesanestimateofthefractionofcountedfibersthatmaybeasbestos.Thispracticeshouldbeusedinconjunctionwithelectronmicroscopy(SeeAppendixX1)forassistanceinidentificationoffibers.1.3Thispracticespecifiestheequipmentandproceduresforsamplingtheatmosphereinthebreathingzoneofanindividualandfordeterminingthenumberoffibersaccumulatedonafiltermembraneduringthecourseofanappropriately-selectedsamplingperiod.Themethodmayalsobeusedtosampletheatmosphereinaspecificlocationinamineorinaroomofabuilding(areasampling).1.4Theidealworkingrangeofthispracticeextendsfrom100fibers/mm2to1300fibers/mm2offilterarea.Fora1000-Lairsample,thiscorrespondstoaconcentrationrangefromapproximately0.04to0.5fiber/mL(orfiber/cm3).Lowerandhigherrangesoffiberconcentrationcanbemeasuredbyreducingorincreasingthevolumeofaircollected.However,whenthispracticeisappliedtopersonalsamplinginminesandquarries,theleveloftotalsuspendedparticulatemayimposeanupperlimittothevolumeofairthatcanbesampledifthefiltersproducedaretobeofappropriateparticulateloadingforfibercounting.1.5UsersshoulddeterminetheirownlimitofdetectionusingtheprocedureinPracticeD6620.Forreference,theNIOSH7400methodgivesthelimitofdetectionas7fibers/mm178;offilterarea.Fora1000-Lairsample,thiscorrespondstoalimitofdetectionof0.0027fiber/mL(orfiber/cm179;).ForOSHAID160thelimitofdetectionisgivenas5.5fibers/mm178;offilterarea.Fora1000-Lairsample,thiscorrespondstoalimitofdetectionof0.0022fiber/mL(orfiber/cm179;).1.6Ifthispracticeyieldsafiberconcentrationthatdoesnotexceedone-halfthepermissibleexposurelimitorthresholdlimitvaluefortheparticularregulatedfibervariety,nofurtheractionmaybenecessary.Ifthefiberconcentrationexceedsone-halfoftheregulatedpermissibleexposurelimitorthresholdlimitvaluefortheparticularregulatedfibervariety,examinethedatatodetermineifmorethan50%ofthecountedfibersmaybebundles,fiberslongerthan10956;m,orfibersthinnerthan1.0956;m.Ifthesecountsexceed50%ofthetotalcount,thenthereisanincreasedpossibilitythatasbestosispresentinthesample.UsetheoptionalmethodspecifiedinAppendixX1tomeasuretheconcentrationorproportionofthe......
【中国标准分类号】:C70
【国际标准分类号】:13_040_30
【页数】:24P.;A4
【正文语种】:
【英文标准名称】:Waterquality-Determinationofnitrogen-Determinationofboundnitrogen(TNb),followingoxidationtonitrogenoxides
【原文标准名称】:水质.氮的测定.根据氧化氮的氧化测定结合氮(TNb)
【标准号】:BSEN12260-2003
【标准状态】:现行
【国别】:英国
【发布日期】:2003-09-25
【实施或试行日期】:2003-09-25
【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】:氨;铵;分析;粘合;化学分析和测试;燃烧;测定;含量测定;冷光;方法;分析方法;硝酸盐;亚硝酸盐;氮;氮含量;二氧化氮;有机化合物;规程;质量;抽样方法;污水;规范(验收);地表水;水常规(实验);水质;水质测试
【英文主题词】:Ammonia;Ammonium;Analysis;Bound;Chemicalanalysisandtesting;Combustion;Determination;Determinationofcontent;Luminescence;Methods;Methodsofanalysis;Nitrates;Nitrites;Nitrogen;Nitrogencontent;Nitrogendioxide;Organiccompounds;Procedures;Quality;Samplingmethods;Sewage;Specification(approval);Surfacewater;Waterpractice;Waterquality;Watertesting
【摘要】:ThisEuropeanStandardspecifiesamethodforthedeterminationofnitrogeninwaterintheformoffreeammonia,ammonium,nitrite,nitrateandorganiccompoundscapableofconversiontonitrogenoxidesundertheoxidativeconditionsdescribed.Determinationiscarriedoutinstrumentally.Dissolvednitrogengasisnotdeterminedbythismethod.Thismethodisapplicabletotheanalysisofsurfacewater,wastewaterandtreatedsewageeffluent.Theconcentrationrangeofthemethodwilldependontheinjectionvolumeusedwhichisinstrumentspecific.Totalnitrogencanbedeterminedintherangefrom1mg/lupto200mg/l.Higherconcentrationscan,ifnecessary,bedeterminedbydilutionofthesample.Thelimitofdetectionwilldependontheinstrumentinuse.Usingasuitableinjectionvolume,thelimitofdetectionistypicallyroundabout0,5mg/l.
【中国标准分类号】:Z16
【国际标准分类号】:13_060_50
【页数】:16P.;A4
【正文语种】:英语