Kinetic-spectrophotometry method for determination of ultra trace amounts of aluminum in food samples

被引：53

作者：

Abbasi, Shahryar ^{[1
]}

Farmany, Abbas ^{[1
]}

Gholivand, Mohammad Bagher ^{[2
]}

Naghipour, Ali ^{[1
]}

Abbasi, Freshteh ^{[3
]}

Khani, Hossein ^{[1
]}

机构：

[1] Ilam Univ, Fac Sci, Dept Chem, Ilam, Iran

[2] Razi Univ, Fac Sci, Dept Chem, Kermanshah, Iran

[3] Azad Univ Ilam, Fac Sci, Dept Chem, Ilam, Iran

来源：

FOOD CHEMISTRY | 2009年 / 116卷 / 04期

关键词：

Kinetic-spectrophotometry method; Food samples; Aluminum; Nile Blue A; SPECTROFLUOROMETRIC DETERMINATION; FOODSTUFFS; AL;

D O I：

10.1016/j.foodchem.2009.03.117

中图分类号：

O69 [应用化学];

学科分类号：

070301 [无机化学];

摘要：

A simple and sensitive kinetic-spectrophotometry method is developed for the determination of trace amounts of aluminum in food samples based on its catalytic effect on the oxidation of Nile Blue A by potassium bromate in sulfuric acid medium. The absorbance is measured at 595.5 nm with the fixed-time method. The optimization of the operating conditions regarding concentrations of the reagents, temperature and interferences are also investigated. The calibration curve is linear over the concentration range 0.07-0.9 mu g ml(-1) of aluminum with good precision and accuracy and the detection limit was down to 0.034 mu g ml(-1). The relative standard deviation for a standard solution of 0.4 mu g ml(-1) of aluminum is 1.73% (n = 10). The proposed method proved highly sensitive, selective and relatively rapid for the assay of aluminum at ultra trace level without any pre-concentration and separation step. The method was applied to the determination of aluminum in food samples (rice, tea and potato). The analytical results of the real samples were in good agreement with the standard method. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1019 / 1023

页数：5

共 33 条

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SPECTROPHOTOMETRIC DETERMINATION OF ALUMINUM BY MORIN [J].