P. Vinas et al., SLURRY PROCEDURES FOR THE DETERMINATION OF CADMIUM AND LEAD IN CEREAL-BASED PRODUCTS USING ELECTROTHERMAL ATOMIC-ABSORPTION SPECTROMETRY, Fresenius' journal of analytical chemistry, 349(4), 1994, pp. 306-310
Simple and rapid methods for the determination of cadmium and lead in
biscuits, bread and cereal-based products using the slurry-ETAAS appro
ach are discussed. Suspensions were prepared in a 20% v/v ethanol medi
um. Phosphate was used as a chemical modifier for lead determination.
For cadmium determination both palladium and a copper plus ammonia mix
ture were used. In both cases platform atomization was used and calibr
ation was performed using aqueous standards. Results for two reference
materials confirmed the reliability of the procedures. Relative stand
ard deviations were in the range of 2.5-6.5% for cadmium and 4.5-14% f
or lead. Detection limits were, respectively, 0.5 and 8 ng/g.