Volatile components of vine leaves from two Portuguese grape varieties (Vitis vinifera L.), Touriga Nacional and Tinta Roriz,analysed by solid-phase microextraction |
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| Authors: | Bruno Fernandes Ana C Correia Fernanda Cosme Fernando M Nunes |
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| Institution: | 1. Polytechnic Institute of Viseu (CI&2. DETS), Agrarian Higher School, Estrada de Nelas, Quinta da Alagoa, Ranhados, 3500-606 Viseu, Portugal;3. Institute for Biotechnology and Bioengineering, Centre of Genomics and Biotechnology, IBB-CGB-UTAD, School of Life Science and Environment, University of Trás-os-Montes and Alto Douro, 5001-801 Vila Real, Portugal;4. CQ-VR, Chemistry Department, Chemistry Research Centre, School of Life Science and Environment, University of Trás-os-Montes and Alto Douro, 5001-801 Vila Real, Portugal |
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| Abstract: | The purpose of this work was to study the volatile composition of vine leaves and vine leaf infusion prepared from vine leaves collected at 30 and 60 days after grape harvest of two Vitis vinifera L. species. Eighteen volatile compounds were identified by gas chromatography–mass spectrometry in vine leaves and in vine leaf infusions. It was observed that the volatile compounds present in vine leaves are dependent on the time of harvest, with benzaldehyde being the major volatile present in vine leaves collected at 30 days after harvesting. There are significant differences in the volatile composition of the leaves from the two grape cultivars, especially in the sample collected at 60 days after grape harvest. This is not reflected in the volatile composition of the vine leaf infusion made from this two cultivars, the more important being the harvesting date for the volatile profile of vine leaf infusion than the vine leaves grape cultivar. |
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| Keywords: | vine leaves volatile compounds solid-phase microextraction |
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