新型螯合試劑的制備和痕量重金屬的分離富集.pdf

1、蘭州大學(xué)博士學(xué)位論文新型螯合試劑的制備和痕量重金屬的分離富集姓名：劉永文申請學(xué)位級別：博士專業(yè)：分析化學(xué)指導(dǎo)教師：常希俊20050501PreparationofNovelChelatingReagentsandSeparationandPreconcentrationofTraceHeavyMetalsABSTRACTTherapiddevelopmentofeconomyresultsinthesteadincreaseofheav

2、ymetalconsuminganddrainingoffThepollutingbyheavymetalsisbecomingmoreandmoreandcomprisesanimportantfactorinfluencingthepeople5ShealthyandsocialeconomicdevelopmentofourcountryTherefore，theseparationandpreconcentrationandde

3、terminationoftraceheavymetalsaretheresearchcontentofanalyticalscientistsToestablishnewmethodsbywhichtraceheavymetalsCanbeseparatedcompletelyandpreconcentratedavailablyanddeterminedexactlyinthispaper，thesynthesisofnewchel

4、atingreagentsandtheiradsorptioncharacteristicsforheavymetalshavebeeninvestigatedsystematicallySomenoveltyconclusionsareasfollows1AccordingtOthesofthardacidandthebaseprinciplesthatthepropertiesofthereagentcanbechangedbych

5、angingthefunctionalgroup，theintermediatesof22Dithio—bis—aniline(DTBA、andthespectropicrecognitionreagentof2Acetylmercapto—phenyldiazoaninoazobenzene(AMPDAA)weresynthesized，andcharacterizedbyIR，UVandelementalanalysis2Inthe

6、presenceofTritonX一100，AMPDAAhasveryhighsensitivitywithamolarabsorptivity2410’，andgoodselectivitytoCd(II)intriethanolaminemediumBasedonthis，ahighlysensitiveandselectivespectrophotometricmethodhasbeendevelopedforthedirectd

7、eterminationoftracecadmiumThcdetectionlimitwasfoundtobe65嶺L』Therelativestandarddeviationwasnomorethan45，0fortenrepeatedmeasu“：mentsof02ggL—Cd(II)3TheheavymetaladsorbentXAD一2一AMPDAAwaspreparedbyloadingXAD一4withAMPDAATheen

8、richmentcharacteristicsofXAD一2一AMPDAAtoheavymetalionswereinvestigatedbystaticandkineticproceduresAnewmethodwasdevelopedforseparationandpreconcentrationanddeterminationoftraceCd，Co，Cu，NiandZnThemethodwasappliedtoanalysiso

9、fCd，Co，Cu，NiandZninnaturalwaterswithsatisfaction4Apreviouslyspectrophotometricmethodforthedeterminationofmercury(1i)using13一dif4一nitrodiazoamino)一benzene(DNAAB)aschromogenicreagenthasbeengreatIyimprovedbyloadingDNAABto盧一