Details
| Original language | English |
|---|---|
| Pages (from-to) | 428-434 |
| Number of pages | 7 |
| Journal | Sensors and Actuators, B: Chemical |
| Volume | 125 |
| Issue number | 2 |
| Publication status | Published - 5 Mar 2007 |
| Externally published | Yes |
Abstract
Ion mobility spectrometry is a well-known method for detecting hazardous compounds in air. Detection limits in the low ppb range and fast response times make this technique more and more popular. Typical applications are the detection of chemical warfare agents, toxic industrial compounds, explosives and drugs. This paper describes the concept and preliminary results of a simple planar ion-focusing aspiration condenser as an ion mobility spectrometer (IMS). Compared to other aspiration condenser IMS with identical ion carrier gas and drift gas, our design has separate gas flows. This allows fluidic focusing of the ion carrier gas by means of geometric constrains. Thus, ions are focused before separation, which results in improved separation power. Furthermore, humidity in the ion carrier gas does not effect peak position in the ion mobility spectrum when using dry drift gas. In addition, the system is easy to fabricate at low-cost, has small dimensions and low power consumption. First measurements of 1-Octanol in air demonstrate the potential of this novel concept.
Keywords
- Aspiration condenser, IMS, Ion mobility spectrometer, MEMS
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. 125, No. 2, 05.03.2007, p. 428-434.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - An ion-focusing aspiration condenser as an ion mobility spectrometer
AU - Zimmermann, Stefan
AU - Abel, Nora
AU - Baether, Wolfgang
AU - Barth, Sebastian
PY - 2007/3/5
Y1 - 2007/3/5
N2 - Ion mobility spectrometry is a well-known method for detecting hazardous compounds in air. Detection limits in the low ppb range and fast response times make this technique more and more popular. Typical applications are the detection of chemical warfare agents, toxic industrial compounds, explosives and drugs. This paper describes the concept and preliminary results of a simple planar ion-focusing aspiration condenser as an ion mobility spectrometer (IMS). Compared to other aspiration condenser IMS with identical ion carrier gas and drift gas, our design has separate gas flows. This allows fluidic focusing of the ion carrier gas by means of geometric constrains. Thus, ions are focused before separation, which results in improved separation power. Furthermore, humidity in the ion carrier gas does not effect peak position in the ion mobility spectrum when using dry drift gas. In addition, the system is easy to fabricate at low-cost, has small dimensions and low power consumption. First measurements of 1-Octanol in air demonstrate the potential of this novel concept.
AB - Ion mobility spectrometry is a well-known method for detecting hazardous compounds in air. Detection limits in the low ppb range and fast response times make this technique more and more popular. Typical applications are the detection of chemical warfare agents, toxic industrial compounds, explosives and drugs. This paper describes the concept and preliminary results of a simple planar ion-focusing aspiration condenser as an ion mobility spectrometer (IMS). Compared to other aspiration condenser IMS with identical ion carrier gas and drift gas, our design has separate gas flows. This allows fluidic focusing of the ion carrier gas by means of geometric constrains. Thus, ions are focused before separation, which results in improved separation power. Furthermore, humidity in the ion carrier gas does not effect peak position in the ion mobility spectrum when using dry drift gas. In addition, the system is easy to fabricate at low-cost, has small dimensions and low power consumption. First measurements of 1-Octanol in air demonstrate the potential of this novel concept.
KW - Aspiration condenser
KW - IMS
KW - Ion mobility spectrometer
KW - MEMS
UR - http://www.scopus.com/inward/record.url?scp=34447642316&partnerID=8YFLogxK
U2 - 10.1016/j.snb.2007.02.038
DO - 10.1016/j.snb.2007.02.038
M3 - Article
AN - SCOPUS:34447642316
VL - 125
SP - 428
EP - 434
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
SN - 0925-4005
IS - 2
ER -