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Rapid determination of C6-aldehydes in tomato plant emission by gas chromatography–mass spectrometry and solid-phase microextraction with on-fiber derivatization

✍ Scribed by Chunhui Deng; Ning Li; Weimin Zhu; Ji Qian; Xiaofeng Yang; Xiangmin Zhang

Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
663 KB
Volume
28
Category
Article
ISSN
1615-9306

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✦ Synopsis

Rapid determination of C 6 -aldehydes in tomato plant emission by gas chromatography-mass spectrometry and solid-phase microextraction with on-fiber derivatization A simple, rapid, sensitive, and solvent-free method was developed for determination of plant-signalling compounds, the three C 6 -aldehydes hexanal, (Z)-3-hexenal, and (E)-2-hexenal, in tomato plant emission by gas chromatography -mass spectrometry (GC-MS) and solid-phase microextraction (SPME) with on-fiber derivatization. In this method, O-2,3,4,5,6-(pentafluorobenzyl)hydroxylamine (PFBHA) in aqueous solution was first headspace adsorbed onto a 65 lm poly(dimethylsiloxane)/divinylbenzene (PDMS/DVB) fiber at 258C for 5 min, and then the fiber with adsorbed PFBHA was used for headspace extraction of tomato plant emission at 258C for 6 min. Finally, the resulting oximes adsorbed on the fiber were desorbed and analyzed by GC-MS. Extraction conditions and method validation were studied. The proposed method had low detection limit values for the three aldehydes from 0.1 to 0.5 ng/L and good precision (RSD less than 10%). In this work, the method was applied to investigation of tomato plant defense response to Helicoverpa armigera.

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