Determination of Lead with a Carbon Paste Electrode Modified with a Chelating Resin in Rainwater and Human Urine
Determination of Lead with a Carbon Paste Electrode Modified with a Chelating Resin in Rainwater and Human Urine
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用螯合树脂修饰的碳糊电极测定雨水和人尿中的铅
DOI：
10.1080/03067318908026890
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发表时间：
1989
影响因子：
2.6
通讯作者：
L. Hernandez
中科院分区：
文献类型：
--
作者：
M. S. Escribano;J. R. Procopio;J. P. Macias;L. Hernandez
本文介绍了用DowexA-1螯合树脂修饰碳糊电极，循环伏安法测定铅的方法。发现最佳的预浓缩条件是在pH 5的乙酸铵溶液中开路10 min。溶出测量的最佳参数是0.1 M HCl溶液作为支持电解质，在-1.0 vs. S.C.E.下延迟时间为48 s。和150 mV/s的扫描速率。在-0.52V vs. S.C.E.处的阳极峰。允许对浓度在4和200 ng/ml之间的铅进行充分定量，LD（3[sgrave]）为1.2 ng/ml。方法用于雨水和人尿中铅的测定。
Abstract A method is described for determination of lead using a carbon paste electrode modified wtih Dowex A-1 chelating ion-exchanger resin and cyclic voltammetry for the electrochemical measurement. The best conditions for preconcentration were found to be open circuit for 10 min in ammonium acetate, pH 5. Optima parameters for the stripping measurements were a HCl 0.1 M solution as supporting electrolyte, a delay time of 48s at –1.0 vs. S.C.E. and a scan rate of 150mv/s. The anodic peak at –0.52V vs. S.C.E. permits adequate quantification of lead in concentration between 4 and 200 ng/ml with a LD (3[sgrave]) of 1.2ng/ml. The method was used for determination of lead in rainwater and human urine.