title: Direct classification of olive oils by using two types of ion mobility spectrometers.
abstract: In this work, we explored the use of an Ion Mobility Spectrometry (IMS) device with an ultraviolet (UV) source, and of a Gas Chromatographic (GC) column coupled to an IM Spectrometer with a tritium source, for the discrimination of three grades of olive oil, namely: extra virgin olive oil (EVOO), olive oil (OO) and pomace olive oil (POO). The three types of oil were analyzed with both equipment combinations as coupled to a headspace system and the obtained ion mobility data were consecutively processed with various chemometric tools. The classification rate for an independent validation set was 86.1% (confidence interval at 95% [83.4%, 88.5%]) with an UV-IMS and 100% (confidence interval at 95% [87%, 100%]) using a GC-IMS system. The classification rate was improved by using a more suitable ionization source and a pre-separation step prior to the IM analysis.
authors.affiliation: Department of Analytical Chemistry, University of Córdoba, Campus of Rabanales, Spain.
authors.forename: Rocío
authors.initials: R
authors.lastname: Garrido-Delgado
authors.forename: Flora
authors.initials: F
authors.lastname: Mercader-Trejo
authors.forename: Stefanie
authors.initials: S
authors.lastname: Sielemann
authors.forename: Wolfgang
authors.initials: W
authors.lastname: de Bruyn
authors.forename: Lourdes
authors.initials: L
authors.lastname: Arce
authors.forename: Miguel
authors.initials: M
authors.lastname: Valcárcel