Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2015;32(11):1851-7.
doi: 10.1080/19440049.2015.1066937. Epub 2015 Sep 12.

Dithizone-modified graphene oxide nano-sheet as a sorbent for pre-concentration and determination of cadmium and lead ions in food

Hamid Reza Moghadam Zadeh  1 , Parvaneh Ahmadvand  1 , Ali Behbahani  1 , Mostafa M Amini  2 , Omid Sayar  3
Affiliations

Dithizone-modified graphene oxide nano-sheet as a sorbent for pre-concentration and determination of cadmium and lead ions in food

Hamid Reza Moghadam Zadeh et al. Food Addit Contam Part A Chem Anal Control Expo Risk Assess. 2015.

Abstract

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 μg l(-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.

Keywords: cadmium; dithizone; food samples; graphene; lead.

PubMed Disclaimer

Publication types

LinkOut - more resources