以鲁米诺为螯合剂，采用吸附溶出伏安法，建立了一种高灵敏度的同时测定食品和水样中超痕量铜和镉的方法。
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.
机构信息
Department of Chemistry, Islamic Azad University, Ilam Branch, Ilam, Iran.
Department of Chemistry, Ilam University, Ilam, Iran.
出版信息
Food Chem. 2011 Dec 1;129(3):1274-80. doi: 10.1016/j.foodchem.2011.05.020. Epub 2011 May 11.
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 0.8-70.0ng/ml for copper and cadmium, respectively. The limit of detection of the method was 0.04ng/ml for Cu(2+) and 0.02ng/ml for Cd(2+). 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.
本研究提出了一种选择性的方法，用于通过吸附溶出伏安法同时测定食品样品中的铜和镉。在初步研究中，已经证明铜和镉与 3-氨基邻苯二甲酰肼（鲁米诺）反应，导致这些配合物的形成。这些配合物在悬汞滴电极（HMDE）上具有吸附特性，并可在还原步骤中被还原。本研究对最佳反应参数和条件进行了研究。校准曲线在铜和镉的浓度范围分别为 0.5-105.0 和 0.8-70.0ng/ml 时呈线性。该方法的检测限为 0.04ng/ml 的 Cu(2+)和 0.02ng/ml 的 Cd(2+)。研究了一些常见离子的干扰，结论是该方法可用于测定食品和水样中的铜（II）和镉，结果令人满意。
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