Comparison of the Concentrations of Metal Elements and Isotopes of Lead Found in Rice and Rice Bran

Very few studies have investigated the difference in the distribution of metal elements between rice and rice bran samples. In this study, the concentrations of 27 metal elements (Li, Be, Na, Mg, Al, K, Ca, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, As, Se, Rb, Sr, Ag, Cd, Cs, Ba, Tl, Pb, and U) in 56 polis...

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Bibliographic Details
Published in:Journal of food protection 2014-08, Vol.77 (8), p.1424-1427
Main Authors: Dai, Shouhui, Yang, Hui, Yang, Lan, Wang, Fuhua, Du, Ruiying, Wen, Dian
Format: Article
Language:English
Subjects:
Biological and medical sciences
Cadmium
Electronic waste
Food
Food contamination & poisoning
Food Contamination - analysis
Food industries
Food safety
Fundamental and applied biological sciences. Psychology
Heavy metals
Isotopes
Isotopes - analysis
Lead
Mass spectrometry
Metal concentrations
Metals
Metals - analysis
Oryza - chemistry
Ratios
Reference materials
Rice
Rice bran
Scientific imaging
Seeds - chemistry
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Summary:Very few studies have investigated the difference in the distribution of metal elements between rice and rice bran samples. In this study, the concentrations of 27 metal elements (Li, Be, Na, Mg, Al, K, Ca, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, As, Se, Rb, Sr, Ag, Cd, Cs, Ba, Tl, Pb, and U) in 56 polished rice and their corresponding bran samples were determined. A significant difference in concentrations of all elements except Ag and Cd was found between rice and bran (P < 0.05), with bran/rice ratios of 1.21 to 36.3. High concentrations of metal elements, especially that of the heavy metal Cr, in bran samples present a potential safety issue for bran products, such as food and feed containing bran. Pb isotope ((204)Pb, (206)Pb, (207)Pb, and (208)Pb) ratios also were determined. The (206)Pb/(207)Pb and (208)Pb/(207)Pb ratios in bran were generally higher than those in rice (P < 0.0001), and rice and bran samples were distinctly different from each other, indicating that Pb isotope composition is an effective for discriminating between bran and rice samples.
ISSN:0362-028X
1944-9097
DOI:10.4315/0362-028X.JFP-14-079