A Portable Integrated Electrochemical Sensing System for On‐Site Nitrite Detection in Food
Yu Sun, Hanwen Xu, Daqi Zhou, Chenyu Xia, Wenquan Liu, Anni Cui, Ziyi Wang, Wei Zheng, Guiye Shan, Jipeng Huang, Xin Wang- Biomaterials
- Biotechnology
- General Materials Science
- General Chemistry
Abstract
Ensuring an appropriate nitrite level in food is essential to keep the body healthy. However, it still remains a huge challenge to offer a portable and low‐cost on‐site food nitrite analysis without any expensive equipment. Herein, a portable integrated electrochemical sensing system (IESS) is developed to achieve rapid on‐site nitrite detection in food, which is composed of a low‐cost disposable microfluidic electrochemical patch for few‐shot nitrite detection, and a reusable smartphone‐assisted electronic device based on self‐designed circuit board for signal processing and wireless transmission. The electrochemical patch based on MXene‐Ti3C2Tx/multiwalled carbon nanotubes‐cyanocobalamin (MXene/MWCNTs‐VB12)‐modified working electrode achieves high sensitivity of 10.533 µA m