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

Kuklya, Andriy; Joksimoski, Sasho; Kerpen, Klaus; Uteschil, Florian; Marks, Robert; Telgheder, Ursula

doi:10.1007/s12127-016-0194-3

Cited by 5 publications

(1 citation statement)

References 24 publications

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“…To increase the sensitivity of DIP-APPI-IMS the analysis was performed using a dopant assisted ionization method with benzene as a dopant (74 mg L -1 in N 2 ). It has an ionization potential (IP) of 9.24 eV, which allows the ionization of most of aromatic compounds and was proven in our previous study to be an effective dopant for ion mobility based methods [19].Under applied experimental conditions, the drift time of the benzene peak (9.33 ms) is much shorter than the drift times of the analyzed compounds (10.86 to 14.72 ms). Therefore, the presence of benzene peak doesn't disturb quantification of analytes.…”

Section: Chemicalsmentioning

confidence: 99%

Direct inlet probe ion mobility spectrometry

Kuklya

Coban

Uteschil

et al. 2018

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Direct inlet probe (DIP) was used as an introduction and a pre-separation step for atmospheric pressure photoionization time-of-flight ion mobility spectrometry (APPI-TOF-IMS) for the first time. IMS is an analytical technique used to separate and identify ionized molecules in the gas phase and under atmospheric pressure based on their mobility. The utilization of DIP prior to IMS gives the possibility to introduce the analytes into the gas phase and provides an additional separation based on their vapor pressure. The proof-of-principle study was done on example of eight polycyclic aromatic hydrocarbons (PAHs) with the ring number from 2 to 5, namely naphthalene, fluorene, anthracene, phenanthrene, pyrene, fluoranthene, benzo[a]pyrene, and benzo[k]fluoranthene. All these compounds are included in EPA priority pollutant list. Moreover, benzo[a]pyrene and benzo[k]fluoranthene are marked by EPA as probably carcinogen compounds and also included into SCF and EU lists. To increase the sensitivity of DIP-APPI-IMS the analysis was performed using a dopant assisted ionization method (benzene, 74mgL in N). It was found that the heating rate of the interface plays a crucial role for the whole analytical procedure. To prove the ability of this method to analyze PAHs in the mixture, the mixtures containing up to five PAHs were analyzed. The LODs for the analyzed compounds obtained with DIP-APPI-IMS were found to be in the tens- or hundreds-of-microgram-per-liter range. The obtained results are promising enough to ensure the potential of DIP as an introduction and a pre-separation step for ion mobility based methods.

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Section: Chemicalsmentioning

confidence: 99%

Direct inlet probe ion mobility spectrometry

Kuklya

Coban

Uteschil

et al. 2018

Talanta

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Time-of-flight ion mobility spectrometry in combination with laser-induced fluorescence detection system

et al. 2017

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A laser-induced fluorescence (LIF) was used as a complimentary detection system for time-of-flight ion mobility spectrometry (TOF-IMS). A LIF detection system is potentially faster than a conventional electrometer detector and can provide additional (to usual for IMS drift time) analytical information, namely wavelength of fluorescence maxima and fluorescence lifetime. Therefore, better discrimination ability can be expected. Additionally, the combination of IMS and LIF operates at atmospheric pressure. This allows fluorescence measurements of specified ions and ion clusters, which would not survive in a mass spectrometer. An IMS drift cell of open design with both the electrometer and LIF detectors was designed. The feasibility of IMS-LIF was demonstrated on the example of the Xanthene dye Rhodamine 6G (R6G). Electrospray was used as an ionization source. The release and desolvation of R6G ions from the electrospray with following IMS-LIF analysis were demonstrated. The effects of experimental parameters (e.g., ion gate and drift voltages, distance to ESI emitter) are demonstrated and discussed. The obtained results are promising enough to ensure the potential of LIF as a complimentary/alternative detection system for time-of-flight ion mobility spectrometry.

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