Electronic and Chemical Sensing Solutions (ECsens), Department of Analytical Chemistry, University of Granada, 18071, Granada, Spain.
Electronic and Chemical Sensing Solutions (ECsens), Department of Analytical Chemistry, University of Granada, 18071, Granada, Spain; Unit of Excellence in Chemistry Applied to Biomedicine and the Environment of the University of Granada, Granada, Spain.
Talanta. 2025 Jan 1;281:126916. doi: 10.1016/j.talanta.2024.126916. Epub 2024 Sep 19.
In this work, three different dyes have been tested for the determination of gaseous ammonia. This gas is one of the products of microbial degradation and therefore its presence is an indicator of deterioration and could be used as a food freshness indicator. Three different sensors have been prepared and tested, two of them using the natural pigments curcumin and anthocyanin and the other one using bromothymol blue. All of them are biocompatible and therefore allowed to use in contact with food. Different compositions, materials for deposition, stability and reversibility for ammonia gas detection have been studied under high humidity conditions simulating real packaged food conditions. Colorimetry is the technique used to obtain the analytical parameter, the H coordinate of the HSV colour space, simply using a camera, avoiding the use of complex instrumentation. Sensibility, toxicity grade and stability found show that the sensor could be implemented in packaged food and form the basis of a freshness indicator for the food industry.
在这项工作中，已经测试了三种不同的染料来测定气态氨。这种气体是微生物降解的产物之一，因此它的存在是变质的指标，可用作食品新鲜度的指示剂。已经制备和测试了三种不同的传感器，其中两种使用天然色素姜黄素和花青素，另一种使用溴百里酚蓝。它们都是生物相容性的，因此允许与食物接触。在模拟实际包装食品条件的高湿度条件下，研究了用于氨气体检测的不同组成、沉积材料、稳定性和可逆性。比色法是用于获得分析参数的技术，HSV 颜色空间的 H 坐标，只需使用相机，避免使用复杂的仪器。所发现的灵敏度、毒性等级和稳定性表明，该传感器可用于包装食品，并为食品工业提供新鲜度指示剂的基础。
