title: Utility of solid phase spectrophotometry for the modified determination of trace amounts of cadmium in 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 (7.05×10(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.
authors.affiliation: Chemistry Department, Faculty of Science, Benha University, Benha, Egypt.
authors.forename: Alaa S
authors.initials: AS
authors.lastname: Amin
authors.affiliation: 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.
authors.forename: Ayman A
authors.initials: AA
authors.lastname: Gouda
mesh_terms: D002104:Cadmium / Q000737:chemistry*; D063427:Food Quality; D013053:Spectrophotometry / Q000379:methods*; D014131:Trace Elements / Q000737:chemistry*
chemical_list: D014131:Trace Elements; D002104:Cadmium
keywords: Cadmium determination; Food samples; Solid phase spectrophotometry; Thiazolylazo-dyes