Removal of some elements from washed and cooked rice studied by inductively coupled plasma mass spectrometry and synchrotron based confocal micro-X-ray fluorescence

V. Mihucz, Geert Silversmit, I. Szalóki, Björn de Samber, Tom Schoonjans, E. Tatár, László Vincze, István Virág, Jun Yao, G. Záray

Research output: Contribution to journalArticle

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Abstract

Extraction of As, Cd, Cu, Mn, Ni and Ti from two white as well as from one brown rice samples was studied by inductively coupled plasma sector field mass spectrometry (ICP-SF-MS). Samples were subjected to cold and hot water extraction (rice mass to deionised water volume ratio = 1:6, and 1:3, respectively). The discarded liquids were freeze-dried and digested by microwave-assisted digestion. About 50% of the content of the investigated elements could be extracted from the white rice. In case of the brown rice, the boiling water contained As, Cd, Ni and Ti in significant percentages. Elemental distributions in the rice grains determined by synchrotron radiation confocal micro-X-ray fluorescence analysis revealed that a surface layer having a thickness of about 80 μm is the richest region in elements. Ti was detectable only in this so-called skin region. Good correlation was observed for the extraction of As, Mn, Ni and Ti by the above-mentioned two techniques. Thus, in regions affected by heavy metal and other toxic element contamination, those rice dishes would be preferred whose preparation should need abundant amounts of water for washing and cooking, which later should be discarded.

Original languageEnglish
Pages (from-to)290-297
Number of pages8
JournalFood Chemistry
Volume121
Issue number1
DOIs
Publication statusPublished - Jul 1 2010

Fingerprint

Inductively coupled plasma mass spectrometry
Synchrotrons
atomic absorption spectrometry
Mass Spectrometry
X-radiation
Fluorescence
X-Rays
fluorescence
rice
X rays
brown rice
Water
Deionized water
water
Poisons
Cooking
Inductively coupled plasma
Heavy Metals
Synchrotron radiation
Washing

Keywords

  • Arsenic
  • Confocal micro-X-ray fluorescence
  • ICP-MS
  • Micro
  • Rice
  • Toxic elements

ASJC Scopus subject areas

  • Food Science
  • Analytical Chemistry

Cite this

Removal of some elements from washed and cooked rice studied by inductively coupled plasma mass spectrometry and synchrotron based confocal micro-X-ray fluorescence. / Mihucz, V.; Silversmit, Geert; Szalóki, I.; Samber, Björn de; Schoonjans, Tom; Tatár, E.; Vincze, László; Virág, István; Yao, Jun; Záray, G.

In: Food Chemistry, Vol. 121, No. 1, 01.07.2010, p. 290-297.

Research output: Contribution to journalArticle

Mihucz, V. ; Silversmit, Geert ; Szalóki, I. ; Samber, Björn de ; Schoonjans, Tom ; Tatár, E. ; Vincze, László ; Virág, István ; Yao, Jun ; Záray, G. / Removal of some elements from washed and cooked rice studied by inductively coupled plasma mass spectrometry and synchrotron based confocal micro-X-ray fluorescence. In: Food Chemistry. 2010 ; Vol. 121, No. 1. pp. 290-297.
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