Cheese lipid profile using direct imprinting in glass surface mass spectrometry

Author(s)

Damario, Natalia ^[1] ; de Oliveira, Diogo N. ^[1] ; Ferreira, Monica S. ^[1] ; Delafiori, Jeany ^[1] ; Catharino, Rodrigo R. ^[1]

Affiliation

^[1] Univ Estadual Campinas, Sch Pharmaceut Sci, Innovare Biomarkers Lab, BR-13083877 Campinas, SP - Brazil

• Document type: Journal article
• Source: ANALYTICAL METHODS; v. 7, n. 6, p. 2877-2880, 2015.
• Web of Science Citations: 1

Abstract

Cheeses have always been targeted for frauds. Among the most common is the adulteration of highly-priced milk (goat and sheep) with less valuable cow milk, which is sold as a raw material for the cheese industry. The need for sensitive techniques to assess authenticity encourages the development and improvement of analytical methods. Herein we present an approach employing Direct Imprinting in Glass Surface Mass Spectrometry (DIGS-MS) for qualitative cheese analysis in a MALDI instrument, featuring easy sample preparation and fast data acquisition/interpretation. It is possible to readily identify complex lipids in different types of cheese, associating them as potential quality markers. Controlling productive stages may also be feasible using this technology by integrating analytical and statistical data, resulting in a powerful combination for sample discrimination based on lipid profiles. This approach presents great signal cleanliness in mass spectra, with easy data workup and interpretation. (AU)

• FAPESP's process: 11/50400-0 - Mitochondrial energy metabolism, redox state and functionality in cell death and cardiometabolic and neurodegenerative disorders
• Grantee: Aníbal Eugênio Vercesi
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 14/00084-2 - Identification of adulterations and simultaneous determination of nutrients and contaminants in food using direct analysis mass spectrometry and imaging
• Grantee: Diogo Noin de Oliveira
• Support Opportunities: Scholarships in Brazil - Doctorate