Assessing the Bioavailability and Bioaccessibility of Total Arsenic and Arsenic Species in Environmental Samples

Abstract

Studies on the bioavailability of As, of impacted vegetables; and As bioaccesibility in the edible parts of carrots (daucus carota), beets (beta vulgaris) and quinoa (chenopodium) growing in polluted soils thought "in vitro" gastrointestinal process; the As speciation both in the edible parts of vegetables and in their gastrointestinal extracts have been performed. Elemental analysis and As speciation have been performed by ICP-MS and LC-ICP-MS, respectively. The Arsenic recovery after the in vitro gastrointestinal digestion was from 98, 90 and 40% for carrots, beets and quinoa, respectively; with no significant transformation of original As species. These studies provide a clearer understanding of the impact that As and other contaminant elements may present in the population of this high polluted Chilean region.

Mechanisms of arsenic assimilation by plants and countermeasures to attenuate its accumulation in crops other than rice

“…In vitro methods are designed to simulate the pH of the fasting state in a young child, and these conditions have been found to lead to higher bioaccessibility values for many metal (loid)s and thus are considered a more conservative approach (Moreda-Piñeiro et al, 2011). By using a PBET-based approach, Pizarro et al (2017) found that the bioaccessibility value of As for quinoa (Chenopodium quinoa Willd.) was around 40% while those in carrots (Daucus carota subsp.…”