Details
| Original language | English |
|---|---|
| Pages (from-to) | 252-257 |
| Number of pages | 6 |
| Journal | Sensors and Actuators, B: Chemical |
| Volume | 246 |
| Publication status | Published - 16 Feb 2017 |
Abstract
In a former work on the investigation of ion generation and ion-ion recombination kinetics at atmospheric pressure with an ion mobility spectrometer equipped with a pulsable electron emitter, we found that different ion species and concentrations could be distinguished by only considering the specific ion-ion recombination kinetics. In the present work, these findings are utilized for the development of a novel compact and simple gas sensor. In a first step, the gas mixture becomes ionized by atmospheric pressure chemical ionization for a defined ionization time. Subsequently the ionization source is turned off and the ion specific decay of the ion concentration as a function of the recombination time is measured. This decay depends on the generated ion species and the compounds of the gas mixture respectively. For the analysis of these decay curves and visualization of the results, we use discriminant analysis. As an exemplary target analyte, we chose dimethyl-methylphosphonate (DMMP). With the current setup we achieve a limit of detection of 8 ppbvfor the detection of DMMP in presence of significant higher ammonia and formaldehyde concentrations by only considering the recombination kinetics.
Keywords
- Atmospheric pressure chemical ionization, Discriminant analysis, Ion-ion-recombination, ppb-level
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Instrumentation
- Physics and Astronomy(all)
- Condensed Matter Physics
- Materials Science(all)
- Surfaces, Coatings and Films
- Materials Science(all)
- Metals and Alloys
- Engineering(all)
- Electrical and Electronic Engineering
- Materials Science(all)
- Materials Chemistry
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In: Sensors and Actuators, B: Chemical, Vol. 246, 16.02.2017, p. 252-257.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - A novel ion selective gas sensor based on pulsed atmospheric pressure chemical ionization and ion-ion-recombination
AU - Heptner, A.
AU - Reinecke, T.
AU - Angerstein, N.
AU - Zimmermann, S.
N1 - Funding information: This research is funded by the German Research Foundation (DFG ZI 1288/1-2).
PY - 2017/2/16
Y1 - 2017/2/16
N2 - In a former work on the investigation of ion generation and ion-ion recombination kinetics at atmospheric pressure with an ion mobility spectrometer equipped with a pulsable electron emitter, we found that different ion species and concentrations could be distinguished by only considering the specific ion-ion recombination kinetics. In the present work, these findings are utilized for the development of a novel compact and simple gas sensor. In a first step, the gas mixture becomes ionized by atmospheric pressure chemical ionization for a defined ionization time. Subsequently the ionization source is turned off and the ion specific decay of the ion concentration as a function of the recombination time is measured. This decay depends on the generated ion species and the compounds of the gas mixture respectively. For the analysis of these decay curves and visualization of the results, we use discriminant analysis. As an exemplary target analyte, we chose dimethyl-methylphosphonate (DMMP). With the current setup we achieve a limit of detection of 8 ppbvfor the detection of DMMP in presence of significant higher ammonia and formaldehyde concentrations by only considering the recombination kinetics.
AB - In a former work on the investigation of ion generation and ion-ion recombination kinetics at atmospheric pressure with an ion mobility spectrometer equipped with a pulsable electron emitter, we found that different ion species and concentrations could be distinguished by only considering the specific ion-ion recombination kinetics. In the present work, these findings are utilized for the development of a novel compact and simple gas sensor. In a first step, the gas mixture becomes ionized by atmospheric pressure chemical ionization for a defined ionization time. Subsequently the ionization source is turned off and the ion specific decay of the ion concentration as a function of the recombination time is measured. This decay depends on the generated ion species and the compounds of the gas mixture respectively. For the analysis of these decay curves and visualization of the results, we use discriminant analysis. As an exemplary target analyte, we chose dimethyl-methylphosphonate (DMMP). With the current setup we achieve a limit of detection of 8 ppbvfor the detection of DMMP in presence of significant higher ammonia and formaldehyde concentrations by only considering the recombination kinetics.
KW - Atmospheric pressure chemical ionization
KW - Discriminant analysis
KW - Ion-ion-recombination
KW - ppb-level
UR - http://www.scopus.com/inward/record.url?scp=85013070525&partnerID=8YFLogxK
U2 - 10.1016/j.snb.2017.02.086
DO - 10.1016/j.snb.2017.02.086
M3 - Article
AN - SCOPUS:85013070525
VL - 246
SP - 252
EP - 257
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
SN - 0925-4005
ER -