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Journal of Chemistry
Volume 2013, Article ID 138391, 4 pages
http://dx.doi.org/10.1155/2013/138391
Research Article

Study and Determination of As, Cr, and Pb in Amaranth Seeds

1Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Chacabuco y Pedernera, 5700 San Luis, Argentina
2Facultad de Ciencias Exactas y Naturales, Universidad Nacional de La Pampa, Avenida Uruguay 151, Santa Rosa, 6300 La Pampa, Argentina
3Instituto de Ciencias de la Tierra y Ambientales de La Pampa (INCITAP), Avenida Uruguay 151 Santa Rosa, 6300 La Pampa, Argentina
4Instituto de Química San Luis (INQUISAL), Chacabuco y Pedernera, 5700 San Luis, Argentina

Received 8 May 2013; Revised 4 July 2013; Accepted 7 July 2013

Academic Editor: Theocharis C. Stamatatos

Copyright © 2013 Elba Graciela Aguilar et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The concentration of As, Cr, and Pb toxic elements was determined in three species of amaranth seeds: A. hypochondriacus, A. cruentus, and A. dubius. The determinations were carried out by inductively coupled plasma optical atomic spectroscopy (ICP-OES). The result shows that Cr and As were found in minor concentrations than allowed by the World Health Organization (WHO; 120 and 4 mg kg−1 resp.); As (mg kg−1): A. dubius (0.76) A. cruentus (<0.50) and A. hypochondriacus (<0.50); Cr (mg kg−1): A. dubius (8.19) A. cruentus (1.15) and A. hypochondriacus (1.20). However, the concentration of Pb was high: A. dubius (19.04) A. cruentus (30.20) and A. hypochondriacus (35.56) more than the maximum of WHO (10 mg kg−1). To avoid systematic error, recovery and validation studies were performed: recovery test: 102.3%; validation (by standard addition): 96.0–103.1%. Due to the fact that amaranth had been proposed as new food due to its nutraceutical properties, the high concentration of Pb found in this study indicates that Pb should be evaluated in these amaranth species to avoid the intake of toxic element by human beings.