Model study of modern oil-based paint media by triacylglycerol profiling in positive and negative ionization modes.

Lipid binders have traditionally been determined in paintings by using gas chromatography/mass spectrometry (GC/MS) to identify the characteristic profiles and ratios of fatty acids . However, the presence of mixtures in contemporary and modern oil paints makes the GC/MS determination of fatty acids insufficient to fully characterize the lipid binding media. In this study we prove that triacylglycerol (TAG) profiling by high-performance liquid chromatography with high-resolution tandem mass spectrometry, using ESI in positive and negative ionization modes is highly effective.

Py-GC/MS applied to the analysis of synthetic organic pigments: characterization and identification in paint samples.

A collection of 76 synthetic organic pigments was analysed using pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS). The purpose of this work was to expand the knowledge on synthetic pigments and to assess characteristic pyrolysis products that could help in the identification of these pigments in paint samples. We analysed several classes of synthetic pigments not previously reported as being analysed by this technique: some metal complexes, β-naphthol pigment lakes, BONA pigment lakes, disazopyrazolone, triarylcarbonium, dioxazine, anthraquinone, indanthrone, isoindoline and thioindigo classes.

Core shell stationary phases for a novel separation of triglycerides in plant oils by high performance liquid chromatography with electrospray-quadrupole-time of flight mass spectrometer.

A new method for the analysis of triglycerides (TAGs) in vegetable oils was developed using a Poroshell 120 EC-C18 column (3.0 mm×50 mm, 2.7 μm) with a high resolution ESI-Q-ToF tandem mass spectrometer as detection system.