Utility of solid phase spectrophotometry for the modified determination of trace amounts of cadmium in food samples

Alaa S Amin; Ayman A Gouda

doi:10.1016/j.foodchem.2011.10.028

Utility of solid phase spectrophotometry for the modified determination of trace amounts of cadmium in food samples

Food Chem. 2012 May 1;132(1):518-24. doi: 10.1016/j.foodchem.2011.10.028. Epub 2011 Oct 28.

Authors

Alaa S Amin¹, Ayman A Gouda²

Affiliations

¹ Chemistry Department, Faculty of Science, Benha University, Benha, Egypt.
² Chemistry Department, Faculty of Science, Zagazig University, Zagazig, Egypt; Faculty of Community, Department of Medical Science, Umm Al-Qura University, Makkah, Saudi Arabia. Electronic address: aymanchimca@yahoo.com.

PMID: 26434325
DOI: 10.1016/j.foodchem.2011.10.028

Abstract

A modified selective, highly sensitive and accurate procedure for the determination of trace amounts of cadmium which reacts with 1-(2-benzothiazolylazo)-2-hydroxy-3-naphthoic acid (BTAHNA) to give a deep violet complex with high molar absorptivity (7.05×10(6)Lmol(-1) cm(-1), 3.92×10(7)Lmol(-1)cm(-1), 1.78×10(8)Lmol(-1)cm(-1), and 4.10×10(8)Lmol(-1)cm(-1)), fixed on a Dowex 1-X8 type anion-exchange resin for 10mL, 100mL, 500mL, and 1000mL, respectively. Calibration is linear over the range 0.2-3.5μgL(-1) with RSD of ⩽1.14% (n=10). The detection and quantification limits were calculated. Increasing the sample volume can enhance the sensitivity. The method has been successfully applied for the determination of Cd(II) in food samples, water samples and some salts samples without interfering effect of various cations and anions.

Keywords: Cadmium determination; Food samples; Solid phase spectrophotometry; Thiazolylazo-dyes.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Cadmium / chemistry*
Food Quality*
Spectrophotometry / methods*
Trace Elements / chemistry*

Substances

Trace Elements
Cadmium