ABTT浊点萃取分光光度法测定废水中的痕量镍王慕华

ABTT－*323000TritonX－114－1－－3－－ABTTTritonX－114。λ=540nm8.064×105L/mol·cm0～0.35μg/mL0.9990。97.9%～102.1%。DETERMINATIONOFTRACENICKELINWASTEWATERBYSPECTROPHOTOMETRYWITHABTTCLOUDPOINTEXTRACTIONWangMuhuaZhangChunniuZhengYunfaZhangXiaoyanDepartmentofChemistryLishuiUniversityLishui323000ChinaAbstractAnewmethodutilizingnon-ionicsurfactantofTritonX-114whichcanbeseparatedintotwophasesbyheatingtoitscloudpointwasdevelopedtoextracttracenickelinwastewatersamples．TheeffectsofexperimentalconditionsofTritonX-114assurfactantand1-azobenzene-3-thiazoly-triazeneABTTascomplexingagentoncloudpointextractionCPEwerediscussed．Theapparentmolarabsorptivityofthecomplexis8.064×105L/mol·cmat540nmλmaxBeer’slawwasobeyedfornickelintherangeof0～0.35μg/mLwithcorrelationcoefficient0.9990.Undertheoptimalexperimentconditionstherecoveryrateofnickelwas97.9%～102.1%．Themethodhasbeenappliedtothedirectdeterminationofnickelinwastewatersampleswithsatisfactoryresults．Keywordscloudpointextractionspectrophotometrytracenickel*Y201018676。0．cloudpointextractionCPE、、、、－、1。、、2-3、、。X4-56-8。1--3--ABTTTritonX－114、、。11.1UV－1801021201110295DOI:10.13205/j.hjgc.2011.05.006pHs－3BHHS－。ABTT0.4g/LNi2+1.000g/LNi2+7μg/mLTritonX－114φ=2%Na2B4O7－NaOH2mol/LNaOHpH。。1.2ABTTABTT1。1ABTT1.310mL0.80mLpH10.50Na2B4O7－NaOH0.60mL2%TritonX－1140.4mL0.4g/LABTT60℃15min3500r/min10min20min1∶22mL0.5cm540nm。22.1UV－1801360～600nm430nm540nm△λ=110nm。2。2.2。pH9.0～12Na2B4O7－NaOHNi2+。3。pH10.0ApH10.5。23pH。pH10.54。0.8mLpH10.5Na2B4O7－NaOH0.8mL。42.3ABTTpH10.50.8mL0.5mL2%TritonX－114Ni2+0.14μg/mL5。0.4g/LABTT0.4mL。1212011102950.4g/LABTT0.4mL。5ABTT2.4TritonX－114TritonX－114。TritonX－1146。2%TritonX－1140.6mLTritonX－1440.6mL。6TritonX－1142.50～0.35μg/mLA=2.564c－0.0068cμg/mL0.9990。8.064×105mol－1·L·cm－1。2.6、。0.1μg/mL≤5%K+、Na+、NH+4、F－、Cl－、I－、Br－、NO－3、SO2－4、CO2－3、SO－3、Cr2O2－4、PO3－4、SiO2－3。1mL5g/LNaF－Na2S2O3Cd2+、Hg2+≤0.2μg/mLZn2+≤0.25μg/mLCu2+≤0.3μg/mLCo2+≤0.35μg/mL。2.7HNO3、H2O21mL5g/LNaF－Na2S2O31。1n=5AAS/μg·mL－1/μg·mL－1/μg·mL－1/μg·mL－1/%RSD/%10.1680.1650.1400.30297.92.820.1370.1420.1400.285102.12.63、、。ABTTNi2+TritonX－114、。1∶2。、。。1．－J．2008252263-268．2．4－－4’－J．201030161-64．3．—Ni2+J．200220417-19．4．XJ．2009262113-115.5．J．201036146-48．6．－J．200922[e-mail]2011－01－27221201110295