Chitosan Pretreatment: Evidence of Enhanced Mechanical Stability and Adsorption Capacity to Produce a Hybrid Material Sueslley G. G. Rodrigues, Gisele S. Lopes, Elisane Longhinotti, Izaura C. N. Diógenes Journal of the Brazilian Chemical Society, 2025 Securing a food supply is a global issue that must be integrated into a sustainable framework to mitigate the effects of climate change. This study focuses on the synthesis of a hybrid material for detecting heterocyclic aromatic amines (HAAs), which are potential mutagenic and carcinogenic compounds generated during the heat processing of food. A novel approach was applied to produce films based on chitosan biopolymer incorporated with [Fe(CN)5(OH2)]3−, CS-Fe, which functions as the active moiety for the detection of quinoxaline (IQx), a molecule similar to HAAs. The pretreatment of the chitosan (CS) films significantly improved mechanical stability and more than doubled the adsorption capacity for [Fe(CN)5(OH2)]3−. The measurements from real samples indicated that the CS-Fe film can selectively detect IQx, even amidst common interfering amino acids like methionine, tryptophan, and histidine. In summary, the CS-Fe film may be regarded as an eco-friendly and cost-effective material suitable for food safety applications.
Adsorption of Safranin on Pseudostem Banana Fibers Antonio Éder Araújo de Sousa, Elis Cristina Chagas Gomes, Diego de Quadros Melo, Izaura Cirino Nogueira Diógenes, Helena Becker, et al. Separation Science and Technology Philadelphia, 2014
