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《ANALYTICAL LABORATORY》 1994-06
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Separation and Determination of V(Ⅴ),Co(Ⅱ),Ni(Ⅱ)and Cr(Ⅵ)with 4-( 6-Methyl-2-Benzothiazolylazo)Phloroglucinol by Reversed-Phase HPLC

Miao Yuxia;Wang Hong; ZhangHuashan;Cheng Jieke(Department of Chemistry,Wuhan University,Wuhan 430072)  
A method for the separation and determination ofV(Ⅴ),Co(Ⅱ),Ni(Ⅱ)and Cr(Ⅵ)by using a newreagent 4-(6-methyl-2-benzothiazolylazo)phloroglucinol(6-MeBTAP)as the pre-columnderivative reagent by RP-HPLC was investigated inthis work.V(Ⅴ),Co(Ⅱ), Ni(Ⅱ)and Cr (Ⅵ)ionsreact with 6-MeBTAP in weak acidic medium to formstable red color chelates by heating in a boiling water-bath for about 20 minutes. The maximum absorptionsof the chelates were between 548 and 556nm, and thedetection wavelengthwas set at 550nm.It was foundthat the four chelates could be separated on a C_(18)column using a mobile phase consisted of methanol-water(78/22,V/V)containing 10 mmol/L pH6.80acetate buffer,10 mmol/L TBA·Br and 10 ̄(-4) mol/LEDTA,The detection limits were 1.7ng for Cr,0.9ngfor Co,1.5ng for Ni and 5.45ng for V when RSN=3。
【Fund】: 国家自然科学基金
【CateGory Index】: O657.72
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