Rapid detection of peptide markers for authentication purposes in raw and cooked meat using ambient liquid extraction surface analysis mass spectrometry

Montowska, Magdalena and Alexander, Morgan R. and Tucker, Gregory A. and Barrett, David A. (2014) Rapid detection of peptide markers for authentication purposes in raw and cooked meat using ambient liquid extraction surface analysis mass spectrometry. Analytical Chemistry, 86 (20). pp. 10257-10265. ISSN 1520-6882

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Abstract

In this paper, our previously developed ambient LESA-MS methodology is implemented to analyze five types of thermally treated meat species, namely beef, pork, horse, chicken, and turkey meat, in order to select and identify heat-stable and species-specific peptide markers. In-solution tryptic digests of cooked meats were deposited onto a polymer surface, followed by LESA-MS analysis and evaluation using multivariate data analysis and tandem electrospray MS. The five types of cooked meat were clearly discriminated using principal component analysis and orthogonal partial least squares discriminant analysis. A number of 23 heat stable peptide markers unique to species and muscle protein were identified following data-dependent tandem LESA-MS analysis. Surface extraction and direct ambient MS analysis of mixtures of cooked meat species was performed for the first time and enabled detection of 10% (w/w) of pork, horse, and turkey meat, and 5% (w/w) of chicken meat in beef, using the developed LESA-MS/MS analysis. The study shows, for the first time, that ambient LESA-MS methodology displays specificity sufficient to be implemented effectively for the analysis of processed and complex peptide digests. The proposed approach is much faster and simpler than other measurement tools for meat speciation; it has potential for application in other areas of meat science or food production.

Item Type: Article
Keywords: Liquid extraction surface analysis mass spectrometry; Food adulteration; Skeletal muscle proteins; Peptide markers; Beef; Pork; Horse; Chicken; Turkey
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Biosciences > Division of Nutritional Sciences
University of Nottingham, UK > Faculty of Science > School of Pharmacy
Identification Number: https://doi.org/10.1021/ac502449w
Depositing User: Barrett, Dave
Date Deposited: 12 Dec 2017 08:18
Last Modified: 13 Dec 2017 01:10
URI: http://eprints.nottingham.ac.uk/id/eprint/48626

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