Non-polar modifier assisted analysis of aromatic compounds by means of planar differential ion mobility spectrometry with a ⁶³Ni ionization source

Abstract

In this paper we demonstrate that the choice of an appropriate non-polar modifier which can provide sufficient chemical interactions with the target analytes may lead to the improvement of the selectivity and sensitivity of differential ion mobility spectrometric (DMS) methods.

Analysis of gasoline contaminated water samples by means of dopant-assisted atmospheric pressure photoionization differential ion mobility spectrometry

“…Moreover, the increase of the resolving power of planar DMS in the presence of chemical modifiers was also demonstrated [14][15][16][17].…”

“…The influence of the aromatic modifier (benzene), which can provide efficient π-π modifier-to-analyte interaction, on the DMS separation ability was investigated in our research group previously [17]. More information about this topic can be found elsewhere [5,17,26]. the linear dynamic range and therefore the quantification of the eluted substance can be complicated (see section 3.5 in ref.…”

“…This model demonstrates that the ion-cluster size and the ioncluster mobility are dependent on the concentration of the clustering particles (and thus, the benzene concentration), cluster temperature, and complex formation energy. The influence of the aromatic modifier (benzene), which can provide efficient π-π modifier-to-analyte interaction, on the DMS separation ability was investigated in our research group previously [17]. More information about this topic can be found elsewhere [5,17,26].…”

“…Most of other aromatic substances in gasoline produce signals at higher compensation fields (values closer to CF zero), therefore the signal of benzene does not complicate the analysis of other aromatic compounds. Moreover, with increase of benzene concentration in the carrier gas the signal of benzene is shifted towards more negative CF values increasing the analytical CF-gap [17]. Based on discussed above, benzene was chosen as a dopant for this study.…”

Dopants and gas modifiers in ion mobility spectrometry

“…Non-polar aromatic compounds have also been used as modifiers [106]. Detection of toluene, ethylbenzene, p-xylene, trimethylbenzene, and naphthalene was performed with DMS using benzene as a gas modifier.…”