Determination of Meat Authenticity Using a Comprehensive Targeted Proteomic Strategy and High-Resolution Mass Spectrometry

Instrument Type: LCMS

We present a summary of a sensitive and robust HRAM LC-MS method using a Thermo Scientific Q Exactive mass spectrometer for the identification and detection of marker proteins in raw meat samples. Four proteotypic peptides were used to perform accurate meat speciation and authenticity. Myoglobin tryptic peptides from each species were detected with an observed m/z below 1.3 ppm. This targeted method allowed for the detection of undesired meat species down to 1% (w/w) of the entire sample.

AN143: Determination of Organic Acids in Fruit Juices

Instrument Type: IC

This application note shows how organic acids can be determined in fruit juices at low to high mg/L concentrations using a simple dilution, an IonPac AS11-HC, electrolytically generated eluent gradients, and suppressed conductivity detection. The fruit juices analyzed in this application note are orange, grape, apple, and cranberry.