Laboratório de Físico-Química e Química Ambiental, Departamento de Química, Universidade Federal de Ouro Preto (UFOP), Campus Morro do Cruzeiro, CEP 35400-000, Ouro Preto, MG, Brazil.
Departamento de Química, Universidade Federal de Lavras (UFLA), Campus Universitário, CEP 37200-000, Lavras, MG, Brazil.
Carbohydr Polym. 2020 Feb 15;230:115679. doi: 10.1016/j.carbpol.2019.115679. Epub 2019 Nov 27.
A robust and sustainable sensor for the detection of Al(III) ions in water was developed by immobilization of anthocyanin (AN) from black rice in a film formed by carboxymethylcellulose (CMC) and starch. Characterization of the films was performed using solubility, thickness, FTIR, and mechanical analysis. The film exhibited an irreversible color change from red to purple in response to the presence of Al(III). The best colorimetric response of the sensor was observed at pH 4.5 and a time of 60 min, achieving the detection of 3 mg L of Al(III). For concentrations higher than 5 mg L, the sensor response time decreased to 20 min. The minimum Al(III) concentration detected with the naked eye was lower than the maximum permissible concentrations in aqueous effluents according to different legislations, indicating the potential of this study to develop sensors for the detection of Al(III).
通过将黑米中的花青素（AN）固定在羧甲基纤维素（CMC）和淀粉形成的薄膜中，开发出一种用于水中 Al(III) 离子检测的稳健且可持续的传感器。使用溶解度、厚度、FTIR 和机械分析对薄膜进行了表征。薄膜在存在 Al(III) 时会发生从红色到紫色的不可逆颜色变化。传感器的最佳比色响应在 pH 4.5 和 60 分钟时观察到，可检测到 3mg·L 的 Al(III)。对于浓度高于 5mg·L 的 Al(III)，传感器的响应时间缩短至 20 分钟。用肉眼检测到的最低 Al(III)浓度低于不同法规规定的水废水中的最大允许浓度，表明本研究有可能开发用于检测 Al(III)的传感器。
