AR2.4 - Electronic nose based on piezoelectric quartz crystal array sensors for the discrimination of different types of coffee beans
- Event
- 17th International Meeting on Chemical Sensors - IMCS 2018
2018-07-15 - 2018-07-19
Vienna, Austria - Chapter
- Sensor Arrays 2
- Author(s)
- G. Sianghio, D. Albano - Research Center for the Natural and Applied Sciences, University of Santo Tomas, Manila (Philippines), V. Abarintos - The Graduate School University of Santo Tomas, Manila (Philippines)
- Pages
- 268 - 269
- DOI
- 10.5162/IMCS2018/AR2.4
- ISBN
- 978-3-9816876-9-9
- Price
- free
Abstract
An array of piezoelectric quartz crystal (PQC) based on organic polymers was assembled for the differentiation of types of coffees. Each PQC sensors were coated with polystyrene, polyvinyl chloride, ethyl cellulose, polyethylene glycol, polycyanoacrylate, and polyvinyl acetate. The frequency shift of the sensors were measured and observed to change when exposed to the headspace of coffee beans. The sensor response was rapid and exhibited good reversibility and reproducibility. Different signals were obtained for each coffee bean sample and pattern recognition techniques were employed for the analysis of the data. The developed E-nose system was able to discriminate kopi luwak (Civet coffee) , Philippine baraco (liberica), excelsa, robusta and arabica.