ASTM D1126-2002(2007)e1 水硬度的标准试验方法

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【英文标准名称】:StandardTestMethodforHardnessinWater
【原文标准名称】:水硬度的标准试验方法
【标准号】:ASTMD1126-2002(2007)e1
【标准状态】:现行
【国别】:
【发布日期】:2002
【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】:D19.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:硬度;(水的)硬度;试验;水
【英文主题词】:analysis;calciumcarbonatehardness;hardness;titration;water
【摘要】:Hardnesssaltsinwater,notablycalciumandmagnesium,aretheprimarycauseoftubeandpipescaling,whichfrequentlycausesfailuresandlossofprocessefficiencyduetocloggingorlossofheattransfer,orboth.Hardnessiscausedbyanypolyvalentcations,butthoseotherthanCaandMgareseldompresentinmorethantraceamounts.Thetermhardnesswasoriginallyappliedtowaterinwhichitwashardtowash;itreferredtothesoap-wastingpropertiesofwater.Withmostnormalalkalinewater,thesesoap-wastingpropertiesaredirectlyrelatedtothecalciumandmagnesiumcontent.1.1Thistestmethodcoversthedeterminationofhardnessinwaterbytitration.Thistestmethodisapplicabletowatersthatareclearinappearanceandfreeofchemicalsthatwillcomplexcalciumormagnesium.Thelowerdetectionlimitofthistestmethodisapproximately2to5mg/LasCaCO3;theupperlimitcanbeextendedtoallconcentrationsbysampledilution.Itispossibletodifferentiatebetweenhardnessduetocalciumionsandthatduetomagnesiumionsbythistestmethod.1.2Thistestmethodwastestedonreagentwateronly.Itistheuser''sresponsibilitytoensurethevalidityofthetestmethodforwatersofuntestedmatrices.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Z16
【国际标准分类号】:13_060_50
【页数】:4P.;A4
【正文语种】: