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Fingerprinting of yogurt products by laser desorption spray post‐ionization mass spectrometry
Author(s) -
Liu Jia,
Qiu Bo,
Luo Hai
Publication year - 2010
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.4527
Subject(s) - chemistry , mass spectrometry , chromatography , ambient ionization , analytical chemistry (journal) , ionization , chemical ionization , organic chemistry , ion
Yogurt and related products have been directly analyzed using laser desorption spray post‐ionization mass spectrometry (LDSPI‐MS) in positive ion mode. Assignments are made for some of the abundant diagnostic peaks through LDSPI‐MS/MS analysis in comparison with authentic compounds. It is demonstrated that different yogurt products can be reliably differentiated according to their LDSPI‐MS spectra. Principal component analysis (PCA) is further used to clearly show the capability of LDSPI‐MS fingerprinting for rapid sorting of yogurt products. We believe that this sample‐preparation‐free technique can be a very useful product screening tool in the dairy industry because of its simplicity, reliability and high throughput. Copyright © 2010 John Wiley & Sons, Ltd.