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1、DB××/T××××—××××住宅社區物業服務技術標準贵阳金阳新生活XX物业服务有限公司2009年A284--284nmwavelengthmeasuredwithabsorbance;A386--336nmwavelengthmeasuredwithabsorbance;M--samplequality,g.Note:Ifthereisadispute,anultravioletspectrophotometryforarbitrationlaw.thequalitativeidentificationseeAppendixa(A
2、ppendixtothestandard)neededtoneutralizeacidityreferstoacidityper100gofsample1mol/Lnumberofmlofsodiumhydroxidesolution.1reagentsandmaterials,exceptasotherwiseprovided,thereagentispure,waterasdistilledwater.1.10.1mol/Lsodiumhydroxidestandardsolutiondissolve4gofsodiumhydr
3、oxidein1Lbytheboilingandcoolingwater,potassiumhydrogenphthalate(referencesample)accordingtoitsrulesofplaycalibrationconcentration.Saidtakeadvancein1250CShidryhadofobenzeneIIcarboxylicacidhydrogenpotassium(benchmarkreagents0.8g~0.9g(preciseto0.0002g),placed350mLtaperedb
4、ottleinthe,with50mLbyboilingHoucoolingofwaterdissolved,joined2~3drops1%phenolphthaleinindicatesagent,withhydrogenoxidationsodiumsolutiontitrationtosolutionispink,toin10swithinnotfadedforend.bytype(3)calculationsodiumhydroxidestandardsolutionofconcentration:C=m÷(Vx0.204
5、2).................................(3)intheformula:C--standardsolutionofsodiumhydroxideconcentration,mol/l;Thequalityofm--potassiumhydrogenphthalate,g;V--dropsoftimeconsumedbythevolumeofstandardsolutionofsodiumhydroxide,mL;0.204IDB××/T××××—××××1）××××发布××××-××-××实施××××-
6、××-××发布广东省住宅小区物业管理服务技术标准（讨论稿）DB××/T××××—××××DB××广东省地方标准ICS备案号：A284--284nmwavelengthmeasuredwithabsorbance;A386--336nmwavelengthmeasuredwithabsorbance;M--samplequality,g.Note:Ifthereisadispute,anultravioletspectrophotometryforarbitrationlaw.thequalitativeidentifications
7、eeAppendixa(Appendixtothestandard)neededtoneutralizeacidityreferstoacidityper100gofsample1mol/Lnumberofmlofsodiumhydroxidesolution.1reagentsandmaterials,exceptasotherwiseprovided,thereagentispure,waterasdistilledwater.1.10.1mol/Lsodiumhydroxidestandardsolutiondissolve4
8、gofsodiumhydroxidein1Lbytheboilingandcoolingwater,potassiumhydrogenphthalate(referencesample)accordingtoitsrulesofpla
