Abstract
Particle-desorption mass spectrometry (PDMS) by using 252Cf was applied to multicomponent dye samples. A mixture of cesium iodide with three cationic dyes (rhodamine B, methyl violet and methylene blue), and a crude carotenoid sample extracted from a carrot were examined. In the positive-ion detection mode, the individual components of the dye mixture were identified by the detection of intactly desorbed preformed cations. In the carotenoid extract, two neutral components, carotene and lutein (xanthophyll), provided adduct ions, (M+H) + In both examples, further fragmentation occurred, providing peaks useful for structural interpretation. These examples illustrate the ability of PDMS to acquire qualitative information from mixtures without a prior separation step.
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