Electrical impedance estimation for pork tissues during chilled storage.
Yue Leng1, Yonghai Sun1, Xiaodan Wang1
1College of Food Science and Engineering, Jilin University, Changchun 130062, China.
Meat Science
|November 26, 2019
Summary
Electrical impedance spectroscopy effectively monitors pork quality during chilled storage. This technique reveals cell membrane damage and changes in meat traits like pH and conductivity over time.
Area of Science:
- Food Science
- Meat Science
- Biophysics
Background:
- Pork quality is affected by chilled storage, impacting cell physiology.
- Understanding these changes is crucial for maintaining meat integrity.
Purpose of the Study:
- To characterize pork loin impedance and physicochemistry during chilled storage.
- To evaluate the potential of electrical impedance spectroscopy (EIS) for assessing pork tissue status.
Main Methods:
- Pork loins were stored for 0, 1, 3, 7, and 15 days.
- Impedance spectra were analyzed using a modified Hayden model with needle and bar electrodes.
- Meat traits (cooking loss, color, pH, texture, conductivity) were measured.
Main Results:
- Pork conductivity and pH increased, while color and texture parameters significantly differed with storage time.
- Impedance characteristics correlated with prolonged storage.
- EIS data indicated damage to cell membrane structures and integrity.
Conclusions:
- Electrical impedance spectroscopy is a promising tool for non-destructively evaluating pork physiological status during chilled storage.
- EIS can detect cellular changes associated with meat spoilage.
- This technology aids in quality control and shelf-life prediction for pork products.
