Determinación de arsénico total en alimentos a base de arroz para niños de hasta 3 años de edad y para celíacos.

Abstract

The purpose of the research was to determine the total arsenic in rice-based food for both, 3-year old children and celiac through (ICP-OES) Inductively coupled plasma optical emission spectrometry. part of the research was to carry out a sampling of rice-based products in the supermarkets of three different cities such as: Riobamba (Supermaxi, Mi comisariato), Guayaquil (Megamaxi) and Quito (Santa María); forty four samples of the products were collected, these were analyzed in triplicate at (CESTTA) Centro de Servicios Técnicos y Transferencia Tecnológica Ambiental located at the Science Faculty of Escuela Superior Politécnica de Chimborazo. All the rice-based solid products were crushed while semi solid products were put under a drying process and then the crushing process was carried out with the use of a mortar and pestle, then the products were packed in previously coded ziploc bags in order to avoid any contamination. The products were weighed (1,00 g), then they were treated with nitric acid (1:1) and put to digestion chemical process for 2 hours. The samples were filtered, completed with distilled water and then put into sterilized and coded containers. To determine the total arsenic in the ICP (Inductively coupled plasma) equipment, it was necessary to take a 1-ml aliquot of prepared sample. The arsenic result obtained showed values under the detection limit (500 ug/kg). Thus the results cannot be compared with CODEX ALIMENTARIUS, 2011 norm for arsenic. This norm establishes that the maximum concentration of arsenic allowed for rice-based products is 0,3 mg/kg, so it is concluded that none sample shows a maximum concentration established. Thus, it is recommended to carry out with the corresponding investigations about the topic to contribute to food safety of children and celiac people who have an intake of these products as a part of their diet.