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International Journal of Electrochemistry
Volume 2012, Article ID 687429, 7 pages
Research Article

Tomato Quality during Short-Term Storage Assessed by Colour and Electronic Nose

1Solid Research Center (CINSO), Institute of Scientific and Technological Research for Defense (CITEDEF-CONICET), Juan Bautista de la Salle 4970, Villa Martelli, B1603ALO Buenos Aires, Argentina
2National Council of Scientific and Technical Research (CONICET), Rivadavia 1917, C1033AAJ Buenos Aires, Argentina
3Institute of Biotechnology, National Institute of Agricultural Technology (INTA), MorΓ³n, B1708WAB Buenos Aires, Argentina
4Institute of Food Technology, National Institute of Agricultural Technology (INTA), MorΓ³n, B1708WAB Buenos Aires, Argentina

Received 1 September 2011; Revised 13 November 2011; Accepted 27 November 2011

Academic Editor: BenjamΓ­n R. Scharifker

Copyright © 2012 Valeria Messina et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


An assay based on an electronic olfactory system was set to evaluate tomato fruits by sensing the aromatic volatiles during postharvest storage of 21 days at 1 9 Β± 0 . 5 ∘ C in darkness. Olfactory system measurements were coupled with colour values. Odour profile and senescence parameters were carried out at 7-day intervals. Discriminant function analysis applied to electronic nose data showed three components, accounting for 99.2% of the total variance. In the present assay, separation among groups according to storage time (0, 7, and 14 days) was observed for wildtype. Overexpressed (Money Maker) lines/plants of tomato showed difference between odour profile for day 0 and day 21, even tough a no clear discrimination between 7 and 14 days was observed. Fruit lost weight almost linearly with shelf life ( 𝑃 < 0 . 0 0 1 ) presenting an averaged loss of 21% ( π‘Ÿ 2 = 0 . 9 8 ) for over-expressed (Money Maker) lines/plants, 13% ( π‘Ÿ 2 = 0 . 9 7 ) for silenced (Money Maker), and 14% ( π‘Ÿ 2 = 0 . 9 8 ) for wild type during 21 days of storage. Colour values 𝐿 βˆ— , π‘Ž βˆ— , and 𝑏 βˆ— data showed that colour properties changed during storage for all the lines considered. Correlations between odour profiles and colour parameter were obtained showing that the electronic nose is a useful technique for monitoring short-term storage of tomato.