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Non-volatile analysis in fruits by laser resonant ionization spectrometry: application to resveratrol (3,5,4 -trihydroxystilbene) in grapes
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Orientador(es)
Resumo(s)
A laser desorption (LD) coupled with resonanceenhanced multiphoton ionisation (REMPI) and time-of-flight mass spectrometry (TOFMS) technique for non-volatile trace
analysis compounds is presented. Essential features are: (a)an enhanced desorption yield due to the mixing of metal powder
with the analyte in the sample preparation, (b) a high resolution, great sensitivity and low detection limit due to laser resonant ionisation and mass spectrometry detection.
Application to resveratrol content in grapes demonstrated the capability of the analytical method with a sensitivity of 0.2 pg per single laser shot and a detection limit of 5 ppb.
Descrição
Applied Physics B Lasers and Optics, vol.71
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Contexto Educativo
Citação
Editora
Springer-Verlag