Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1308, Issue -, Pages 114-124Publisher
ELSEVIER
DOI: 10.1016/j.chroma.2013.08.015
Keywords
Triglycerides; HPLC; ESI-Q-ToF; Core-shell stationary phase; Poroshell 120 EC-C18; Vegetable oils
Funding
- PAR-FAS Regione Toscana
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A new method for the analysis of triglycerides (TAGs) in vegetable oils was developed using a Poroshell 120 EC-C18 column (3.0 mm x 50 mm, 2.7 mu m) with a high resolution ESI-Q-ToF tandem mass spectrometer as detection system. We used an Agilent Poroshell column, which is characterized by a recently developed stationary phase based on non-porous core particles. The results highlighted the advantages of this column in terms of the dramatic improvement in the number of theoretical plates and in low column backpressure. The developed method enabled us to analyze complex mixtures of more than 40 TAGs within less than 25 min and with a low backpressure (lower than 100 bar), and represents the first application of a core-shell stationary phase in reverse phase HPLC using an ESI-Q-ToF as detection system. The method was optimized on standards of TAGs, validated and applied to several plant oils. By a quantitative point of view, the method showed a very good linearity (r(2)>0.999) in the range 0.1-2.4 mu g/g; high intra- and inter-day precision both in terms of retention times (RSD% < 0.04%) and peak areas (RSD% < 0.3%). Limits of detection and quantitation were lower than 0.03 mu g/g and 0.10 mu g/g, respectively. (C) 2013 Elsevier B.V. All rights reserved.
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