AATCC149-2002(2007)螯合剂氨基多元酸有其盐类的螯合值测定草酸钙法.pdf

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1、Freebz.net标准下载网AATCCTestMethod149-2002ChelatingAgents:ChelationValueofAminopolycarboxylicAcidsandTheirSalts;CalciumOxalateMethodDevelopedin1976byAATCCCommit-detailssuchasmaterialsafetydatasheets6.3DiethylaminehydrochlorideteeRA90;editoriallyrevisedandreaf-andothermanufacturer’srecommenda

2、-[(C2H5)2NH·HCl]firmed1977,1985(newtitle),1997;tions.AllOSHAstandardsandrules6.4Sodiumhydroxide(NaOH)solu-reaffirmed1980,2002;editoriallyre-mustalsobeconsultedandfollowed.tion,50%W/W.vised1984,1986,1988(newtitle);re-4.1Goodlaboratorypracticesshould6.5Hydrochloricacid(HCl)conc.vised1992.b

3、efollowed.Wearsafetyglassesinalllaboratoryareas.7.Sampling4.2Allchemicalsshouldbehandled1.PurposeandScope7.1Thetestshouldbeconductedinwithcare.triplicate;i.e.,threetestspecimensfroma1.1Theactivecontentofethylene-4.3Inpreparing,dispensingandhan-sampleshouldbeanalyzed.diaminetetraaceticaci

4、d(EDTA),N-hy-dlinghydrochloricacidandsodiumhy-droxyethylethylenediaminetriaceticaciddroxideusechemicalgogglesorface8.Conditioning(HEDTA)anddiethylenetriaminepenta-shield,imperviousglovesandanimper-aceticacid(DTPA)andtheirsaltsisusu-viousapron.Concentratedacidsshould8.1Ifsolidchelatingage

5、ntisbeingallyexpressedbythecalciumchelationbehandledonlyinanadequatelyventi-evaluated,drya2gsampleattheappro-value(CaCV).Thisvalueindicatesthelatedlaboratoryhood.CAUTION:Al-priatetemperatureforatleast2handamountofcalcium(ascalciumcarbon-waysaddacidtowater.coolindesiccatorbeforeweighingsp

6、eci-ate)whichwillbechelatedbyaknown4.4Diethylaminehydrochlorideisanmens.weightofchelatingagent.eye,skinandrespiratoryirritant.It8.2Dryfreeacidformsofchelatingshouldbehandledonlyinanadequatelyagentsat120°C.2.Principleventilatedhood.8.3Drysaltformsofchelatingagents4.5Aneyewash/safetyshower

7、shouldat80°C.2.1Thechelationvalueisdeterminedbelocatednearbyandaself-containedexperimentallybytitratingaweighedbreathingapparatusshouldbereadily9.Specimenssampleofchelatingagentwithacalciumavailableforemergencyuse.ionsolutionofknownconcentration.A4.6Exposuretochemicalsuse