Determination of toxic heavy metals in rice samples using ultrasound assisted emulsification microextraction combined with inductively coupled plasma optical emission spectroscopy.

Autor: Ebrahimi-Najafabadi H; Department of Medicinal Chemistry, School of Pharmacy, Guilan University of Medical Sciences, Rasht, Iran. Electronic address: h.ebrahimi@gums.ac.ir., Pasdaran A; Medicinal Plants Processing Research Center, Shiraz University of Medical Sciences, Shiraz, Iran., Rezaei Bezenjani R; Department of Chemistry, Faculty of Sciences, Islamic Azad University, Kerman Branch, Kerman, Iran., Bozorgzadeh E; Department of Medical Biotechnology, School of Paramedicine, Guilan University of Medical Sciences, Rasht, Iran; Medical Biotechnology Research Center, Guilan University of Medical Sciences, Rasht, Iran. Electronic address: elahe.bozorgzadeh@gmail.com.
Jazyk: angličtina
Zdroj: Food chemistry [Food Chem] 2019 Aug 15; Vol. 289, pp. 26-32. Date of Electronic Publication: 2019 Mar 12.
DOI: 10.1016/j.foodchem.2019.03.046
Abstrakt: A straightforward and efficient method was developed by ultrasound assisted emulsification microextraction (USAEME) combined with inductively coupled plasma optical emission spectroscopy (ICP/OES) to trace some toxic heavy metal ions in eight select farmed and four select imported rice samples. In this study, carbon tetrachloride (CCl 4 ) and 1-(2-pyridylazo)2-naphthol (PAN) were used as the extraction solvent and complexing reagent, respectively. The extraction parameters were optimized by means of a central composite design (CCD). Detection and quantification limits were set to be between 0.02 and 0.08 µg L -1 and 0.07-0.30 µg L -1 , respectively. The accuracy of our method was further verified against two certified reference materials namely NCS ZC73029 and NIES No 10-b. While no trace of contaminations was found in some rice samples (Tarom, Hashemi, Sadri, Khazar and one imported sample), others such as Kazemi, Jamshidi, Dom Siah, Guilanehand and three of the imported samples were considerably polluted.
(Copyright © 2019 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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