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Identification of Volatile Organic Compounds by Retention Times and Ion Mobility Spectra

Retention times are determined and ion mobility spectra are recorded for reference substances belonging to the homologous series of saturated aldehydes, ketones, and alcohols with a nonbranched chain containing from two to nine carbon atoms. For aldehydes, ketones, and alcohols, the retention times grow exponentially with the number of carbon atoms in the analyte. The retention times decrease exponentially with increasing separation temperature. The dependences of the reduced mobilities of two peaks in the ion ograms of aldehydes, ketones, and alcohols with drift in air at 330 K on the number of carbon atoms in the analyte molecules with a saturated nonbranched chain are obtained. In the range of molecular weights studied, normalized mobilities linearly decrease with increasing number of carbon atoms in the analyte, which is consistent with the published data. For substances with equal numbers of carbon atoms and a nonbranched chain, mobility decreases in the order ketone > aldehyde > alcohol.

Identification of Volatile Organic Compounds by Retention Times and Ion Mobility Spectra.pdf

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