Abstract
Two analytical procedures, one based on purge-and-trap and the other on solid phase microextraction, both followed by GC–MS measurement using an ion-trap mass spectrometer in the electron impact mode, have been developed for determination and quantitation of up to 39 aroma compounds in fresh tomatoes. The method based on purge-and-trap for isolation of the volatile compounds uses Tenax as adsorbent and a hexane–diethyl ether mixture as solvent for elution. The method was validated for linearity, precision (better than 20% for most compounds), and limit of detection, which was approximately 1 ng g−1. This method enabled identification of up to 30 compounds in real samples. Use of SPME was considered as an alternative, to simplify sample treatment while maintaining the information level for the samples (e.g. the number of compounds detected) and quality of quantitation. A procedure based on SPME using a Carboxen/polydimethylsiloxane fibre was developed and validated for determination of 29 aroma compounds; precision was better than 20% and limits of detection ranged from 4 to 30 ng g−1.
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Acknowledgements
This work has been developed with financial support from the Ministry of Science and Technology (Project AGL2002-04224-C02-01) of Spain. The Purchase of the Varian GC–MS system was financed by the Generalitat Valenciana (INFRAEXTRUCTURA04/022).
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Beltran, J., Serrano, E., López, F.J. et al. Comparison of two quantitative GC–MS methods for analysis of tomato aroma based on purge-and-trap and on solid-phase microextraction. Anal Bioanal Chem 385, 1255–1264 (2006). https://doi.org/10.1007/s00216-006-0410-9
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DOI: https://doi.org/10.1007/s00216-006-0410-9