Application of dopamine as an electroactive ligand for the determination of aluminum in biological fluids

Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry
Fuping ZhangTianming Yang

Abstract

Dopamine (3,4-dihydroxyphenylethylamine, DA) is applied as an electroactive chelant for indirect determination of aluminum (Al) in biological fluids. It is observed that the decrease of the differential pulse voltammetric (DPV) anodic peak current of DA is linear with the increase of Al concentration. Under optimum experimental conditions (pH 8.6, 2.0 x 10(-4) M DA, and 0.03 M NH4Ac-NH3 x H2O buffer solution), two linear ranges, 5.0 x 10(-8) - 4.0 x 10(-7) M and 4.0 x 10(-7) - 7.2 x 10(-6) M Al(III), are obtained. The detection limit of Al is 1.9 x 10(-8) M and the relative standard deviation for 4 x 10(-6) M Al(III) is 3.1% (N = 8). Many biologically active foreign species have been selected for interference. Excellent recoveries and accuracy have been obtained in the measurements of Al in biological samples such as synthetic renal dialysate, Ringer's solution, human whole blood, cerebrospinal fluid of demented patient, and urine of diabetic patient. The methodological principle that Al complexes with DA on the electroactive position result in the depression of electrochemical activities of DA has been verified by comparing both the electrochemical behaviors and the spectroscopic responses like UV-vis and Raman of DA in the pr...Continue Reading

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Citations

Feb 1, 2003·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Xiaodi YangJun Hu
Mar 1, 2003·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Xiaodi YangZhiping Bai
Jul 2, 2003·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Xiaodi YangZhengbiao Yang
Nov 14, 2007·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Fuping ZhangShuping Bi

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