Title: | Atmospheric pressure photoionization - High-field asymmetric ion mobility spectrometry (APPI-FAIMS) studies for on-site monitoring of aromatic volatile organic compounds (VOCs) in groundwater |
Author(s): | Joksimoski S; Kerpen K; Telgheder U; |
Address: | "Department of Instrumental Analytical Chemistry (IAC), University of Duisburg-Essen, Universitatsstr.5, 45141, Essen, Germany. Department of Instrumental Analytical Chemistry (IAC), University of Duisburg-Essen, Universitatsstr.5, 45141, Essen, Germany; IWW, Moritz Str. 26, 45476, Mulheim an der Ruhr, Germany. Electronic address: ursula.telgheder@uni-due.de" |
DOI: | 10.1016/j.talanta.2022.123555 |
ISSN/ISBN: | 1873-3573 (Electronic) 0039-9140 (Linking) |
Abstract: | "A continuously operating system for monitoring groundwater contamination by aromatic VOCs has been developed. For this purpose, a novel gas-water separation unit was to be used in combination with APPI-FAIMS. The gas-water separation unit successfully reduced the humidity in the sample flow to =1.6 ppm(v) prior to analyte ionization. Initially, toluene was selected as a model aromatic VOC. The quantitative response of toluene, as a single VOC in water (LOD <1 mg L(-1)), was used to investigate the feasibility of the monitoring system and the effect of humidity on the signal produced by the APPI-FAIMS. With humidity increase (up to 400 ppm(v)) an increase of the toluene signal for about 30% was observed, including the possible formation and detection of water clusters and toluene-water clusters. Similar effects were noted in the case of benzene. However, for the detection of single contaminants such as indane and trimethylbenzenes (TMBs) this was not observed even at relative high humidity (500 ppmv). Additionally, on-site, continuous, groundwater monitoring of the aromatic VOCs contamination was carried out successfully with the gas-water separation APPI-FAIMS at low humidity (0.3-1.6 ppm(v)) allowing simplified monitoring of a specific, total aromatic VOCs signal in groundwater" |
Keywords: | Atmospheric Pressure *Groundwater/chemistry Ion Mobility Spectrometry Toluene/analysis *Volatile Organic Compounds/analysis Water/analysis Aromatic VOCs in groundwater Atmospheric pressure photoionization Dopant effect High-field asymmetric ion mobility s; |
Notes: | "MedlineJoksimoski, Sasho Kerpen, Klaus Telgheder, Ursula eng Netherlands 2022/05/26 Talanta. 2022 Sep 1; 247:123555. doi: 10.1016/j.talanta.2022.123555. Epub 2022 May 18" |