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Characterization of spoilage-related volatile organic compounds in packaged leaf salads
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SYSNO ASEP 0519358 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Characterization of spoilage-related volatile organic compounds in packaged leaf salads Author(s) Dryahina, Kseniya (UFCH-W) RID, ORCID
Som, Suman (UFCH-W)
Smith, D. (GB)
Španěl, Patrik (UFCH-W) RID, ORCIDSource Title Flavour and Fragrance Journal. - : Wiley - ISSN 0882-5734
Roč. 35, č. 1 (2020), s. 24-33Number of pages 10 s. Language eng - English Country US - United States Keywords dimethyl disulphide ; dimethyl sulphide ; leaf salad ; methanol ; sift-ms ; spoilage ; volatile organic compounds Subject RIV CF - Physical ; Theoretical Chemistry OECD category Physical chemistry R&D Projects GA18-12902S GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support UFCH-W - RVO:61388955 UT WOS 000531410600002 EID SCOPUS 85071921609 DOI 10.1002/ffj.3535 Annotation A study has been made of the volatile organic compounds (VOCs) released into the contained headspace of packaged lamb's lettuce (Valerianella locusta) plants, cut at the roots, and of separated rocket (Eruca sativa) and baby spinach (Spinacia oleracea) leaves. Direct real-time analyses of the headspace were carried out on each of five consecutive days using selected-ion flow-tube mass spectrometry (SIFT-MS) and secondary electrospray ionization mass spectrometry (SESI-MS), together with concomitant off-line analyses using solid-phase microextraction (SPME) and gas chromatography mass spectrometry (GC-MS). It was observed that the concentrations of organosulphur compounds, especially dimethyl sulphide (DMS) and dimethyl disulphide (DMDS) were relatively low in the headspace of fresh samples, but increased exponentially over the 5 days for rocket, increased to a lesser extent for spinach, and increased to an even lesser extent for lamb's lettuce. Methanol was detected in the headspace of even fresh samples of lamb's lettuce, and its concentration increased for the subsequent 2–3 days before decreasing. This trend was mirrored in the isoprenoids analysed, which are characteristic of plant tissues. These results show that direct real-time VOC analyses by SIFT-MS can be usefully exploited to monitor fresh leaf salad spoilage, and that SESI-MS spectra show patterns that are characteristic of salad type and storage time. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2021 Electronic address http://hdl.handle.net/11104/0304353
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