Stabilization of an MQ-3 Sensor for Ethanol Measurement in Cowpea Seeds

Abstract

The widespread adoption of sensor technology has made it a standard practice for obtaining precise and timely information during the harvest and post-harvest periods. One sensor that has gained popularity for post-harvest seed monitoring is the MQ-3, which identifies ethanol in the air as products undergo fermentation. However, these sensors typically require a stable operation. This study aimed to assess the stabilization time of an MQ-3 sensor when measuring ethanol levels in anaerobic bean seeds. We used six bean seed samples, each with an average moisture content of around 14%. We employed a completely randomized experimental design with nine repetitions for each sample. Every repetition consisted of 25 bean seeds placed in sealed flasks containing 70 mL of distilled water. This setup induced anoxic conditions within the flask, promoting anaerobic respiration in the seeds. After 24 hours, we exposed an air sample to the MQ-3 sensor and took readings at various time intervals (12-14, 19-21, 36-38, 68-70, 130-132, 192-194, 314-316, 616-618 seconds). The average stabilization time for the MQ-3 sensor while quantifying ethanol concentrations in the bean samples were approximately 23 seconds. The sensor demonstrated efficacy, convenience, and rapidity in assessing ethanol levels in anaerobic bean seeds.

Corn Seeds Stored Under Varying Storage Conditions

“…It supports the assertion by Oliveira et al (2011), indicating that the cold room is deemed the optimal environment for seed storage, even when utilizing diverse packaging methods such as Tetra Pak ® and cotton bags. The reduced temperature in the storage environment diminishes the activity of enzymes associated with respiration, a critical process that contributes significantly to the loss of seed viability (Harrington, 1972;Cavalcante et al, 2023).…”