doi:

DOI: 10.3724/SP.J.1123.2017.06013

Chinese Journal of Chromatography (色谱) 2017/35:10 PP.1037-1041

High-sensitive detection of multiple allergenic proteins in infant food with high-resolution mass spectrometry


Abstract:
A novel method of the simultaneous detection of multiple kinds of allergenic proteins in infant food with parallel reaction monitoring (PRM) mode using liquid chromatography-tandem mass spectrometry (LC-MS/MS) was established. In this method, unique peptides with good stability and high sensibility were used to quantify the corresponding allergenic proteins. Furthermore, multiple kinds of allergenic proteins are inspected simultaneously with high sensitivity. In addition, such method was successfully used for the detection of multiple allergenic proteins in infant food. As for the sample preparation for infant food, compared with the traditional acetone precipitation strategy, the protein extraction efficiency and capacity of resisting disturbance are both higher with in-situ filter-aided sample pretreatment (i-FASP) method. All allergenic proteins gave a good linear response with the correlation coefficients (R2) ≥ 0.99, and the largest concentration range of the allergenic proteins could be four orders of magnitude, and the lowest detection limit was 0.028 mg/L, which was better than that reported in references. Finally, the method was conveniently used to detect the allergens from four imported infant food real samples. All the results demonstrate that this novel strategy is of great significance for providing a rapid and reliable analytical technique for allergen proteomics.

Key words:parallel reaction monitoring (PRM),liquid chromatography-tandem mass spectrometry (LC-MS/MS),allergenic protein,infant food

ReleaseDate:2017-11-03 11:22:09



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