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Więcej informacji o Analysis of Dithiocarbamate Fungicide Residues by Liquid Chromatography/Mass Spectrometry and Isotope Ratio Mass Spectrometry

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Opis

On the basis of the earlier experiences, the goal was to develop a simple, rapid, and sensitive LC/MS method for the simultaneous determination of 'intact' DTC fungicide residues in fruits and vegetables that eliminates the most time-consuming steps, i.e. derivatization and clean-up steps. The following issues were addressed: - Extensive screening of diverse LC columns from different suppliers to evaluate a suitable column for separating the DTCs with consideration that DTCs are only stable under strong alkaline conditions; - Development of a simple volatile MS-tolerant eluent with consideration that DTCs are only stable under strong alkaline conditions; - On the basis of the existing extraction buffers, a simple extraction buffer had to be developed to increase the stability of very unstable DTCs in the presence of plant juices; the stability tests must be performed; - Due to the high instability of DTC residues extracted from plant samples, a stable isotope dilution assay (SIDA) had to be applied, i.e. a stable isotope-Iabeled DTCs as internal standards are necessary; - Validation of the new LC/MS method on different fruits and vegetables with regard to reproducibility and recovery. Concerning the fact that generally LC/MS/MS systems are used in pesticide residues analysis, it was additional aim to develop a more sensitive method of LC/MS/MS as an improvement of LC/MS method. The validation of the new LC/MS/MS method on different fruits and vegetables had to be performed and proven by parallel analyses using the LC/MS method and the common CS2 digestion/distillation method, and so to check the routine capability of LC/MS(/MS) for the residue analysis ofDTC fungicides.

Szczegóły książki

• Pełny tytuł: Analysis of Dithiocarbamate Fungicide Residues by Liquid Chromatography/Mass Spectrometry and Isotope Ratio Mass Spectrometry
• Autor: Goranka Crnogorac
• Język: Angielski
• Oprawa: Miękka
• Liczba stron: 118
• EAN: 9783832280925
• ISBN: 3832280928
• ID: 12694389
• Wydawca: Shaker Verlag
• Waga: 170 g
• Wymiary: 212 × 151 × 13 mm
• Data wydania: 08. April 2009

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