title: Single-drop microextraction and gas chromatography-mass spectrometry for the determination of volatile aldehydes in fresh cucumbers.
abstract: Headspace single-drop microextraction (HS-SDME) was used as a rapid and reliable method for the isolation and preconcentration of volatile aldehydes from fresh cucumbers. The utility of this methodology is demonstrated in the determination of (E)-2-nonenal and (E,Z)-2,6-nonadienal. The limit of detection, linearity and repeatability have been determined for 2,6-nonadienal and (E)-2-nonenal. Limits of detection for nonenal and nonadienal were 0.05 and 0.04 mg kg(-1), respectively. The repeatability of extraction was obtained with the RSD values lower than 13%. Concentrations of target aldehydes in fresh cucumbers obtained by means of the HS-SDME method were in the range 9.4-12.5 (nonadienal) and 2.6-3.8 mg kg(-1) (nonenal). The results of the single-drop extraction in combination with gas chromatography show promising potential for the analysis of volatile aldehydes in vegetables.
authors.affiliation: Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicholas Copernicus University, 7 Gagarina St., 87 100, Toruń, Poland.
authors.forename: Tomasz
authors.initials: T
authors.lastname: Ligor
authors.forename: Bogusław
authors.initials: B
authors.lastname: Buszewski