Journal
FOOD ADDITIVES AND CONTAMINANTS PART A-CHEMISTRY ANALYSIS CONTROL EXPOSURE & RISK ASSESSMENT
Volume 32, Issue 11, Pages 1851-1857Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/19440049.2015.1066937
Keywords
cadmium; lead; graphene; dithizone; food samples
Funding
- Islamic Azad University (South Tehran Branch)
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Graphene oxide nano-sheet was modified with dithizone as a novel sorbent for selective pre-concentration and determination of Cd(II) and Pb(II) in food. The sorbent was characterised by various analytical methods and the effective parameters for Cd(II) and Pb(II) adsorption were optimised during this work. The high adsorption capacity and selectivity of this sorbent makes the method capable of fast determinations of the Cd(II) and Pb(II) content in complicated matrices even at gl(-1) levels using commonly available instrumentation. The precision of this method was <1.9% from 10 duplicate determinations and its accuracy verified using standard reference materials. Finally, this method was applied to the determination of Cd(II) and Pb(II) ions in common food samples and satisfactory results were obtained.
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