Details
| Original language | English |
|---|---|
| Pages (from-to) | 11834-11841 |
| Number of pages | 8 |
| Journal | Analytical chemistry |
| Volume | 92 |
| Issue number | 17 |
| Early online date | 28 Jul 2020 |
| Publication status | Published - 1 Sept 2020 |
Abstract
Ion mobility spectrometers (IMS) with field switching ion shutters are an excellent choice for trace gas detection, being extremely sensitive while having fast response times. However, as different target molecules may form positive, negative, or even ions of both polarities, it is beneficial to simultaneously detect both ion polarities. Here, we present a dual drift tube IMS with a new dual field switching ion shutter for gating both ion polarities and an X-ray ionization source in orthogonal configuration. The dual field switching ion shutter allows significantly improved ion gating and ion accumulation due to improved shielding of the ionization region from the drift field. Equipped with two 75 mm long high-performance drift tubes, the dual IMS reaches high resolving power of R = 90 with detection limits in the lower pptv range for different ketones, chlorinated hydrocarbons and methyl salicylate that forms ions in both polarities.
ASJC Scopus subject areas
- Chemistry(all)
- Analytical Chemistry
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In: Analytical chemistry, Vol. 92, No. 17, 01.09.2020, p. 11834-11841.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Compact and Sensitive Dual Drift Tube Ion Mobility Spectrometer with a New Dual Field Switching Ion Shutter for Simultaneous Detection of Both Ion Polarities
AU - Lippmann, Martin
AU - Kirk, Ansgar T.
AU - Hitzemann, Moritz
AU - Zimmermann, Stefan
N1 - Funding information: We thank Florian Schlottmann for his help with the high voltage electronic components and we further thank Alexander Bohnhorst and Christoph Schäfer for their help during data analysis. This study was supported by the German Federal Ministry of Education and Research (BMBF) under the Grant 13GW0191D.
PY - 2020/9/1
Y1 - 2020/9/1
N2 - Ion mobility spectrometers (IMS) with field switching ion shutters are an excellent choice for trace gas detection, being extremely sensitive while having fast response times. However, as different target molecules may form positive, negative, or even ions of both polarities, it is beneficial to simultaneously detect both ion polarities. Here, we present a dual drift tube IMS with a new dual field switching ion shutter for gating both ion polarities and an X-ray ionization source in orthogonal configuration. The dual field switching ion shutter allows significantly improved ion gating and ion accumulation due to improved shielding of the ionization region from the drift field. Equipped with two 75 mm long high-performance drift tubes, the dual IMS reaches high resolving power of R = 90 with detection limits in the lower pptv range for different ketones, chlorinated hydrocarbons and methyl salicylate that forms ions in both polarities.
AB - Ion mobility spectrometers (IMS) with field switching ion shutters are an excellent choice for trace gas detection, being extremely sensitive while having fast response times. However, as different target molecules may form positive, negative, or even ions of both polarities, it is beneficial to simultaneously detect both ion polarities. Here, we present a dual drift tube IMS with a new dual field switching ion shutter for gating both ion polarities and an X-ray ionization source in orthogonal configuration. The dual field switching ion shutter allows significantly improved ion gating and ion accumulation due to improved shielding of the ionization region from the drift field. Equipped with two 75 mm long high-performance drift tubes, the dual IMS reaches high resolving power of R = 90 with detection limits in the lower pptv range for different ketones, chlorinated hydrocarbons and methyl salicylate that forms ions in both polarities.
UR - http://www.scopus.com/inward/record.url?scp=85092573852&partnerID=8YFLogxK
U2 - 10.1021/acs.analchem.0c02166
DO - 10.1021/acs.analchem.0c02166
M3 - Article
AN - SCOPUS:85092573852
VL - 92
SP - 11834
EP - 11841
JO - Analytical chemistry
JF - Analytical chemistry
SN - 0003-2700
IS - 17
ER -