A highly sensitive method for simultaneous determination of ultra trace levels of copper and cadmium in food and water samples with luminol as a chelating agent by adsorptive stripping voltammetry

被引：61
作者：
Abbasi, Shahryar [1 ]
Bahiraei, Atousa [2 ]
Abbasai, Freshteh [1 ]
机构：
[1] Islamic Azad Univ, Dept Chem, Ilam Branch, Ilam, Iran
[2] Ilam Univ, Dept Chem, Ilam, Iran
来源：
FOOD CHEMISTRY | 2011年 / 129卷 / 03期
关键词：
Copper; Cadmium; Luminol; Adsorptive stripping voltammetry; Food samples; LEAD; ZINC; COBALT; CU(II); CD(II); COPRECIPITATION; ALUMINUM; PB(II); NICKEL; IRON;
D O I：
10.1016/j.foodchem.2011.05.020
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
In the present study a selective method is presented for the simultaneous determination of copper and cadmium in food samples by adsorptive stripping voltammetry. In preliminary studies, it has been proven that the copper and cadmium react with 3-aminophthalhydrazide (luminol), giving rise to the formation of these complexes. These complexes have adsorptive characteristics on hanging mercury drop electrode (HMDE) and can be reduced in a reduction step. In this study the optimum reaction parameters and conditions studies are investigated. The calibration graphs were linear in the concentration range of 0.5-105.0 and 0.8-70.0 ng/ml for copper and cadmium, respectively. The limit of detection of the method was 0.04 ng/ml for Cu2+ and 0.02 ng/ml for Cd2+. The interference of some common ions was studied and it was concluded that application of this method for the determination of copper (II) and cadmium in food and water samples led to satisfactory results. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1274 / 1280
页数：7
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