An Electronic Nose Based on Copper Oxide Heterojunctions for Rapid Assessment of Liquor

Publication date: July 2019Source: Chinese Journal of Analytical Chemistry, Volume 47, Issue 7Author(s): Kang LIANG, Yu WANG, Jia-Qi HE, Hu MENG, Shu-Qin CHEN, Jun-Yu CHANG, Jian-Mei GAO, Ji-Hui WANG, Liang FENGAbstractThe novel methods for rapid detection and discrimination of aroma have gained huge attentions not only because of the growing demands for food safety supervision, but also due to their high potentials in monitoring and regulating fermentation process in food production. In this work, a prototype of electronic nose was developed by eight metal oxide semiconductor gas sensors which were fabricated based on two different types of CuO heterojunction, namely ZnO-CuO (n-p) and NiO-CuO (p-p). The sensing performance of as-fabricated electronic nose towards 7 volatile organic compounds (VOCs) gases samples and 4 real samples of Chinese Jing Wine was conducted. The responses were analyzed with standard statistical methods, e.g., hierarchical clustering analysis (HCA), and were distinguished accurately against one another with no errors or misclassifications.Graphical abstractIn this work, based on two different types of copper oxide heterojunctions, ZnO-CuO and NiO-CuO, an electronic nose was developed. The sensing properties of self-made electronic nose and four years of real wine samples were studied. The results were analyzed by hierarchical clustering analysis (HCA). Accurate identification of samples was achieved.

Source: Chinese Journal of Analytical Chemistry - July 10, 2019 Category: Chemistry Source Type: research