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Utility of solid phase spectrophotometry for the modified determination of trace amounts of cadmium in food samples
Faculty
Science
Year:
2012
Type of Publication:
Article
Pages:
518-524
Authors:
Gouda, Ayman A, Amin, Alaa S
DOI:
10.1016/j.foodchem.2011.10.028
Journal:
FOOD CHEMISTRY ELSEVIER SCI LTD
Volume:
132
Research Area:
Chemistry; Food Science \& Technology; Nutrition \& Dietetics
ISSN
ISI:000300465100070
Keywords :
Cadmium determination, Solid phase spectrophotometry, Thiazolylazo-dyes, Food samples
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 x 10(6) L mol(-1) cm(-1), 3.92 x 10(7) L mol(-1) cm(-1), 1.78 x 10(8) L mol(-1) cm(-1), and 4.10 x 10(8) L mol(-1) cm(-1)), fixed on a Dowex 1-X8 type anion-exchange resin for 10 mL, 100 mL, 500 mL, and 1000 mL, respectively. Calibration is linear over the range 0.2-3.5 mu g L-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. (C) 2011 Elsevier Ltd. All rights reserved.
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