title: Enhancing sensitivity and selectivity in the determination of aldehydes in olive oil by use of a Tenax TA trap coupled to a UV-ion mobility spectrometer.
abstract: A Tenax TA trap was coupled to an ion mobility spectrometer in order to improve basic analytical properties such as sensitivity and selectivity. The analytical performance of this combination was assessed in the determination of volatile aldehydes between 3 and 6 carbon atoms present in olive oil. The aldehydes were extracted and adsorbed into the trap, from which they were thermally desorbed for analysis by UV-Ion Mobility Spectrometry (UV-IMS). Sensitivity was increased by the preconcentration step and selectivity by the combination of temperature programmed thermal desorption and the ability of the ion mobility spectrometer to monitor the desorbed analytes in real time. The limits of detection obtained were lower than 0.3 mg kg(-1) and the relative standard deviation lower than 10%. A one-way analysis of variance (ANOVA) was used to identify significant differences between olive oil grades in terms of peak heights for the target aldehydes.
authors.affiliation: Department of Analytical Chemistry, Institute of Fine Chemistry and Nanochemistry (IQFN), Marie Curie Annex C3 Building, Campus of Rabanales, University of Córdoba, 14071 Cordoba, Spain.
authors.forename: Rocío
authors.initials: R
authors.lastname: Garrido-Delgado
authors.forename: Flora
authors.initials: F
authors.lastname: Mercader-Trejo
authors.forename: Lourdes
authors.initials: L
authors.lastname: Arce
authors.forename: Miguel
authors.initials: M
authors.lastname: Valcárcel
mesh_terms: D000447:Aldehydes / Q000032:analysis*; D004867:Equipment Design; D008401:Gas Chromatography-Mass Spectrometry / Q000295:instrumentation / Q000379:methods*; D006358:Hot Temperature; D000069463:Olive Oil; D010938:Plant Oils / Q000032:analysis* / Q000737:chemistry; D012044:Regression Analysis; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
chemical_list: D000447:Aldehydes; D000069463:Olive Oil; D010938:Plant Oils