Department of Food & Biological Engineering, Jiangsu University, China.
Department of Food & Biological Engineering, Jiangsu University, China.
Food Chem. 2020 Jan 15;303:125378. doi: 10.1016/j.foodchem.2019.125378. Epub 2019 Aug 19.
This work introduces an inexpensive and user-friendly electrochemical platform for heavy metal determination in liquid food. Smart-phone connectivity, solid-state-microwave flow digestion and nano-Au-modified electrode are synchronously studied. A smart phone is adopted as the information terminal for universal purposes. A solid-state-microwave digestion device is developed to provide programmable digestion for liquid food in a digestion path. Microwave power curve and flow rate in digestion are studied and optimized. A nano-Au-modified electrode, as well as a homemade potentiostat and other electrodes, is used as a tool for electrochemical analyses. Behaviors of this method are evaluated with electrical measurement and stripping voltammetry. This method is used for sensing Cd, Pb and Hg in cow milk, orange juice and apple juice. It provides a sensitive response to ≥2 μg L target ion, and shows satisfying stability and good accuracy in a task up to 72 h.
本工作介绍了一种用于液态食品中重金属测定的廉价、用户友好的电化学平台。同步研究了智能手机连接、固态微波消解和纳米金修饰电极。智能手机被用作通用信息终端。开发了一种固态微波消解装置，为消解路径中的液态食品提供可编程消解。研究并优化了微波功率曲线和消解中的流速。纳米金修饰电极以及自制的恒电位仪和其他电极被用作电化学分析的工具。用电测量和溶出伏安法评估了该方法的行为。该方法用于检测牛奶、橙汁和苹果汁中的 Cd、Pb 和 Hg。它对≥2μg/L 的目标离子有敏感响应，在长达 72 小时的任务中表现出良好的稳定性和准确性。
