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Naseri, M., Rahmanikhah, Z., Beiygloo, V., Ranjbar, S. (2018). Effects of Two Cooking Methods on the Concentrations of Some Heavy Metals (Cadmium, Lead, Chromium, Nickel and Cobalt) in Some Rice Brands Available in Iranian Market. Journal of Chemical Health Risks, 4(2), -. doi: 10.22034/jchr.2018.544068
Mahmood Naseri; Zahedeh Rahmanikhah; Vahid Beiygloo; Somayeh Ranjbar. "Effects of Two Cooking Methods on the Concentrations of Some Heavy Metals (Cadmium, Lead, Chromium, Nickel and Cobalt) in Some Rice Brands Available in Iranian Market". Journal of Chemical Health Risks, 4, 2, 2018, -. doi: 10.22034/jchr.2018.544068
Naseri, M., Rahmanikhah, Z., Beiygloo, V., Ranjbar, S. (2018). 'Effects of Two Cooking Methods on the Concentrations of Some Heavy Metals (Cadmium, Lead, Chromium, Nickel and Cobalt) in Some Rice Brands Available in Iranian Market', Journal of Chemical Health Risks, 4(2), pp. -. doi: 10.22034/jchr.2018.544068
Naseri, M., Rahmanikhah, Z., Beiygloo, V., Ranjbar, S. Effects of Two Cooking Methods on the Concentrations of Some Heavy Metals (Cadmium, Lead, Chromium, Nickel and Cobalt) in Some Rice Brands Available in Iranian Market. Journal of Chemical Health Risks, 2018; 4(2): -. doi: 10.22034/jchr.2018.544068

Effects of Two Cooking Methods on the Concentrations of Some Heavy Metals (Cadmium, Lead, Chromium, Nickel and Cobalt) in Some Rice Brands Available in Iranian Market

Article 8, Volume 4, Issue 2, Spring 2014  XML PDF (379.61 K)
DOI: 10.22034/jchr.2018.544068
Authors
Mahmood Naseri email ; Zahedeh Rahmanikhah; Vahid Beiygloo; Somayeh Ranjbar
Receive Date: 14 June 2014,  Revise Date: 12 November 2019,  Accept Date: 29 October 2018 
Abstract
Dietary intake is the most important route of exposure to heavy metals for most people. Rice is a staple food for Iranians that, if polluted, threatens public health. Cooking process may affect heavy metals content of rice. In this study, concentrations of cadmium (Cd), lead (Pb), chromium (Cr), nickel (Ni) and cobalt (Co) were measured in 3 brands of imported rice available in Shiraz-Iran market. Two methods of cooking (Kateh and Pilaw) were applied for all brands. The heavy metals were detected in raw and cooked rice grains. The samples were analyzed by atomic absorption spectrometer. The mean concentrations of Cd, Pb, Cr, Ni and Co were 0.33, 1.75, 0.38, 0.89 and 0.20 µg/g in raw rice samples respectively, 0.10, 1, 0.29, 0.19, and 0.03 µg/g in Kateh rice samples and 0.10, 0.98, 0.28, 0.18 and 0.03 µg/g in Pilaw rice samples. Cooking rice grains reduced the content of heavy metals. Minimum cooking efficiency was for Cr. The effect of cooking methods was not significantly different in this study. The obtained concentrations were compared with the permitted values, published by Institute of Standards of Iran, for heavy metal contents in rice. Moreover, weekly intakes of the metals through rice were estimated and compared with the PTWI (Provisional Tolerable Weekly Intake) amounts determined by FAO/WHO.
Keywords
heavy metals; Rice; Cooking methods; Weekly intake; Shiraz; Iran
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