• 文献标题:   Dithizone-modified graphene oxide nano-sheet as a sorbent for pre-concentration and determination of cadmium and lead ions in food
  • 文献类型:   Article
  • 作  者:   ZADEH HRM, AHMADVAND P, BEHBAHANI A, AMINI MM, SAYAR O
  • 作者关键词:   cadmium, lead, graphene, dithizone, food sample
  • 出版物名称:   FOOD ADDITIVES CONTAMINANTS PART ACHEMISTRY ANALYSIS CONTROL EXPOSURE RISK ASSESSMENT
  • ISSN:   1944-0049 EI 1944-0057
  • 通讯作者地址:   Islamic Azad Univ
  • 被引频次:   9
  • DOI:   10.1080/19440049.2015.1066937
  • 出版年:   2015

▎ 摘  要

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.