Testing adulterated liquid-egg: developing rapid detection techniques based on colorimetry, electrochemistry, and...

Area of Science:

• Food Science
• Analytical Chemistry
• Biotechnology

Background:

• Liquid eggs are widely used in food processing.
• Ensuring the authenticity and quality of liquid eggs is crucial for consumer safety and industry standards.
• Existing detection methods for liquid egg adulteration can be time-consuming and complex.

Purpose of the Study:

• To develop rapid and distinct detection techniques for common liquid egg adulterations.
• To establish methods for identifying water dilution, altered yolk ratios, and blended egg varieties.
• To provide efficient analytical tools for quality control in the egg processing industry.

Main Methods:

• Colorimetry was employed for detecting water dilution in liquid eggs.
• Electrochemistry was utilized to identify adulteration related to the yolk ratio in whole egg.
• Interfacial fingerprinting, including 3D-fluorescence microscopy and interfacial tension measurements, was used for detecting blended egg varieties.

Main Results:

• Colorimetry achieved rapid detection of water dilution (1 min/sample) with high linearity (R² ≥ 0.984).
• Electrochemistry enabled swift detection of yolk ratio manipulation (6 min/sample, R² ≥ 0.979).
• Interfacial fingerprinting effectively identified blended egg whites (10 min/sample, 1.0-10.0 wt% detection limit) by analyzing interfacial properties.

Conclusions:

• Novel, rapid analytical techniques (colorimetry, electrochemistry, interfacial fingerprinting) have been successfully developed for liquid egg adulteration detection.
• These methods offer distinct advantages in terms of speed and sensitivity for identifying specific types of adulteration.
• The research provides valuable tools for ensuring the integrity and quality of liquid egg products in the food industry.