【英文标准名称】:StandardTestMethodsforTraceAnionsinHighPurityWaterbyIonChromatography
【原文标准名称】:离子色谱法分析高纯度水中痕量阴离子的标准试验方法
【标准号】:ASTMD5542-2004(2009)
【标准状态】:现行
【国别】:美国
【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】:D19.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:anion;eluant;ionchromatography;trace;Acetate;Anionscontent;Bromide(ion)analysis;Chlorideanalysis--waterapplications;Eluent/elution;Fluoride(ion)analysis;Formate;High-puritywater;Iodideion(soluble)content;Ionchromatography(IC
【摘要】:Theanionsfluoride,chloride,andsulfatehavebeenidentifiedasimportantcontributorstocorrosionofhighpressureboilers,electricpowerturbinesandtheirassociatedheatexchangers.Manyelectricpowerutilitiesattempttoreducethesecontaminantsintheirboilerfeedwatertolessthan1x03BC;g/L.Inthesemiconductormanufacturingprocesstheseions,amongothers,havebeenidentifiedasacauseoflowproductyieldand,thus,mustbemonitoredandcontrolledtolevelssimilartothoserequiredbytheelectricpowerindustry.Lowmolecularweightorganicacids,suchasacetateandformate,havebeenfoundinmanysteamgeneratorfeedwatersandcondensates.Theyarebelievedtocomefromthehightemperaturebreakdownoforganicmatterfoundinboilermakeupwater.ItisfeltthattheseorganicacidspromotecorrosionbyloweringthepHofboilerwatersandmayevenbecorrosivethemselves.Suchlowmolecularweightorganicsmayalsobeproducedwhenultravioletlightisusedtoproducebacteria-freewaterforsemiconductorprocessing.Suchpolarorganiccontaminantsaresuspectedofcausingreducedsemiconductoryields.Phosphatesarecommonlyaddedtodrumboilersinthelowmg/Lleveltoprecipitatecalciumandmagnesiumandtherebypreventscaleformation.Ionchromatographycanbeusedtomonitortheconcentrationofsuchchemicalsinboilerwater,aswellasdetectunwantedcarry-overintothesteam.1.1Thesetestmethodscoverthedeterminationoftrace(x03BC;g/L)levelsoffluoride,acetate,formate,chloride,phosphate,andsulfateinhighpuritywaterusingionchromatographyincombinationwithsamplepreconcentration.Otheranions,suchasbromide,nitrite,nitrate,sulfite,andiodidecanbedeterminedbythismethod.However,sincetheyarerarelypresentinsignificantconcentrationsinhighpuritywater,theyarenotincludedinthistestmethod.Twotestmethodsarepresentedandtheirrangesofapplication,asdeterminedbyacollaborativestudy,areasfollows:
RangeTested(x03BC;g/LAdded)
LimitofDetectionA(SingleOperator)(x03BC;g/L)
Sections
TestMethodA:


7x2013;15
Chloride
0x2013;24
0.8

Phosphate
0x2013;39
B

Sulfate
0x2013;55
1.8

TestMethodB:


16x2013;23
Fluoride
0x2013;14
0.7
【英文标准名称】:
【原文标准名称】:路面标线色漆用玻璃珠
【标准号】:JISR3301-1987
【标准状态】:作废
【国别】:日本
【发布日期】:1987-12-01
【实施或试行日期】:1987-12-01
【发布单位】:日本工业标准调查会(JISC)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:信号;道路安全;玻璃;安全装置
【英文主题词】:
【摘要】:
【中国标准分类号】:Q33
【国际标准分类号】:
【页数】:
【正文语种】: