Determination of Shrimp Allergens in Meat Products by Ultra Performance Liquid Chromatography-Tandem Mass Spectrometry

Objective: To establish a method for the determination of shrimp allergens in meat products by ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). Methods: Meat products (cooked ham, sausages and meatballs) with complex matrix components were selected as the detection target. The samples were extracted by ultrasonic in phosphate buffer solution (PBS) for 30 min, and acetonitrile was added to remove fat after centrifugation (10000 r/min, 15 ℃, 10 min). Finally, trypsin (1 mg/mL, 10 μL) was added to the sample diluents which had been mixed with internal peptide (2.5 μmol/L, 40 μL), and the enzymolysis process lasted 16 h at 37 ℃ before UPLC-MS/MS analysis. The samples were separated on a T3 column, and eluted by gradient elution with 0.1% formic acid aqueous solution and acetonitrile. The data was collected by multiple reaction monitoring (MRM) in positive ion mode, and quantified by internal standard method. Results: The method was used to determine the content of shrimp allergen in meat products, and the quantitative peptide had a good linear relationship with the determination coefficients 1.0000 in the range of 0.001~2.0 μmol/L. The limits of detection was 0.67 mg/kg, and the limits of quantification was 2.00 mg/kg. The recovery was 83.2%~104.5% and the precision was 2.63%~7.92% at three spiked levels. Conclusion: The method has the advantages of strong specificity, high sensitivity and good recovery. It was suitable for the screening and quantification of shrimp allergens in meat products.