Analyze Biogenic Amines in Salmon and Shrimp by Capillary Electrophoresis-Tandem MS

Importance of the Topic

Biogenic amines are key indicators of seafood freshness and quality and can pose health risks when present at high levels. Monitoring these compounds supports food safety and compliance with regulatory limits.

Aims and Scope

This study demonstrates a capillary electrophoresis tandem mass spectrometry method for simultaneous quantification of 11 biogenic amines in salmon and shrimp using a polyvinyl alcohol coated capillary to enhance separation efficiency.

Methodology and Instrumentation

Sample preparation involved cryogenic homogenization of seafood, extraction with 10 percent trichloroacetic acid, centrifugation, filtration, and spiking with 1,7-diaminoheptane as internal standard. Instrumentation and conditions included

• Agilent 7100 CE system with PVA coated fused silica capillary (50 µm id, 65 cm total length)
• Background electrolyte: 0.5 M acetic acid, pH 2.5; voltage 25 kV; temperature 25 °C; injection 10 s at 50 mbar
• Agilent 6430 Triple Quadrupole MS with ESI positive mode; sheath liquid methanol with 5 mM acetic acid; flow rate 6.0 µL/min; MRM acquisition

Main Results and Discussion

Calibration curves were linear over 0.02 to 100 µg/mL with R2 greater than 0.998. Limits of detection ranged from 1.1 to 2.7 ng/mL and limits of quantification from 3.6 to 8.9 ng/mL. Recovery tests in spiked salmon and shrimp yielded 86–113 percent with RSD below 5.5 percent. The PVA coating suppressed electroosmotic flow, reduced peak tailing, and achieved baseline separation of all analytes in under ten minutes.

Benefits and Practical Applications

This method offers rapid, sensitive, and environmentally friendly analysis of biogenic amines with minimal solvent waste. It is well suited for routine quality control in seafood and other food matrices.

Future Trends and Opportunities

Advances may include automation of sample preparation, application to a broader range of foods, and integration with high resolution mass spectrometry for enhanced selectivity.

Conclusion

The demonstrated CE-MS/MS approach provides a robust, fast, and sensitive tool for biogenic amine monitoring in seafood, supporting food safety and quality assurance initiatives.

Reference

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