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Electronic Tongue Generating Continuous Recognition Patterns for Protein Analysis
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Hybrid Sensor Array Electronic Nose for Pork Quality Monitoring.

Yijie Zhao1, Shuyao An2, Wenjuan Lu1

  • 1College of Information Science and Engineering, Shanxi Agricultural University, Taigu, Jinzhong 030801, China.

Foods (Basel, Switzerland)
|June 26, 2026
PubMed
Summary

A new electronic nose system uses hybrid sensors to accurately detect pork spoilage. This cost-effective technology provides real-time freshness monitoring for the meat industry.

Keywords:
dynamic gas pathelectronic nosegas sensor arraypork freshnessreal-time detection

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Area of Science:

  • Food Science
  • Sensor Technology
  • Analytical Chemistry

Background:

  • Minimizing spoilage-related losses in the meat industry requires efficient pork freshness monitoring.
  • Existing detection technologies are limited by high cost, poor timeliness, and environmental sensitivity.

Purpose of the Study:

  • To develop a novel electronic nose system for economical and efficient real-time pork freshness assessment.
  • To overcome the limitations of current pork spoilage detection methods.

Main Methods:

  • Developed a hybrid sensor array integrating metal oxide semiconductor (MOS) and electrochemical sensors (e.g., MQ137, MQ136).
  • Implemented a dynamic gas path control with a dual-mode gas circuit design (solenoid valve switching time: 0.85 s).
  • Focused on detecting key volatile organic compounds (VOCs) released during pork spoilage.

Main Results:

  • Achieved over 90% accuracy in identifying pork spoilage stages.
  • Demonstrated high sensitivity to key spoilage-related volatile organic compounds (VOCs).
  • Validated system reliability through dual-mode gas circuit design.

Conclusions:

  • The novel electronic nose offers an economical and efficient real-time monitoring solution.
  • This technology provides a low-cost scientific approach for pork freshness assessment in slaughterhouses and cold chain logistics.