A5.2 - A miniaturized drift tube ion mobility spectrometer for hand-held devices
- AMA Conferences 2017
2017-05-30 - 2017-06-01
- Proceedings Sensor 2017
- A5 - Gas Sensors II
- A. Ahrens, S. Zimmermann - Leibniz Universität Hannover (Germany)
- 105 - 108
A miniaturized low-cost drift tube ion mobility spectrometer is presented. Due its small dimensions of about 15 mm x 15 mm x 90 mm it fits the needs of integration into hand-held devices. In this work, we show operation of a miniaturized drift tube design with a corona discharge ionization source. The major benefit of this ionization source is its non-radioactivity. Therefore, it is not restricted, in comparison to any radioactive sources, by any stringent regulations. By the need of a reaction region for such an ionization source, a three grid ion gate between the reaction and drift region is integrated. For demonstration, spectra of ammonia, acetone and dimethyl methylphosphonate (DMMP) are shown. The developed miniaturized low-cost ion mobility spectrometer has high resolving power of RP = 60 and detection limits in the pptv range for measurement times within one second.