Zusammenfassung: | |
Developing powerful hand-held drift tube ion mobility spectrometers (IMS) requires small, lightweight drift tubes with high analytical performance. In this work, we present an easy-to-manufacture, miniaturized drift tube ion mobility spectrometer, which is manufactured from polyether ether ketone, stainless steel foils and printed circuit boards. It is possible to operate the drift tube IMS with a radioactive 3H ionization source or a non-radioactive X-ray ionization source with 3 kV acceleration voltage. The drift tube design provides high resolving power of Rp = 63 at a drift length of just 40 mm, 15 mm × 15 mm in cross-section (outer dimensions) and a drift voltage of 2.5 kV. The limits of detection for less than one second of averaging are 40 pptv for dimethyl-methylphosphonate and 30 pptv for methyl salicylate. For demonstration, the miniaturized drift tube IMS is integrated into a stand-alone battery-powered mobile device, including a closed gas-loop, high performance driver electronics and wireless data transmission. In a proof-of-concept study, this device was tested in an international field evaluation exercise to detect the release of a volatile, hazardous substance inside a large entry hall.
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Lizenzbestimmungen: | CC BY 4.0 Unported - https://creativecommons.org/licenses/by/4.0/ |
Publikationstyp: | Article |
Publikationsstatus: | publishedVersion |
Erstveröffentlichung: | 2019 |
Schlagwörter (englisch): | mini-IMS, Miniaturized drift tube IMS, Miniaturized drift tube ion mobility spectrometer, Non-radioactive ionization, Drift chambers, Esters, Ethers, Ionization of gases, Ions, Ketones, Particle spectrometers, Printed circuit boards, Printed circuit manufacture, Radioactivity, Tubes (components), Acceleration voltages, Analytical performance, Dimethyl methylphosphonate, Drift tube, Hazardous substances, mini-IMS, Stainless steel foil, Wireless data transmission, Ion mobility spectrometers |
Fachliche Zuordnung (DDC): | 650 | Management |
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