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| Titel |
Development and characterization of a High-Temperature Proton-Transfer-Reaction Mass Spectrometer (HT-PTR-MS) |
| VerfasserIn |
T. Mikoviny, L. Kaser, A. Wisthaler |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 3, no. 3 ; Nr. 3, no. 3 (2010-05-03), S.537-544 |
| Datensatznummer |
250001103
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| Publikation (Nr.) |
 copernicus.org/amt-3-537-2010.pdf |
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| Zusammenfassung |
| We have developed a High-Temperature Proton-Transfer-Reaction Mass Spectrometer
(HT-PTR-MS) in which both the ion source and the ion drift tube can be continuously
operated at temperatures up to 250 °C. The instrument was characterized
in a high E/N-mode (130 Td) and in a low E/N-mode (87 Td) at an
operating temperature of 200 °C. Instrumental sensitivities and
2σ-detection limits were on the order of 50–110 cps/ppb and
100 ppt (1 s signal integration time), respectively. The HT-PTR-MS
is primarily intended for measuring "sticky" or semi-volatile trace gases.
Alternatively, it may be coupled to a particle collection/thermal desorption
apparatus to measure particle-bound organics in near real-time. In view of these
applications, we have measured instrumental response times for a series of reference
compounds. 1/e2-response times for dimethyl sulfoxide, ammonia and monoethanolamine
were in the sub-second to second regime. 1/e2-response times for levoglucosan,
oxalic acid and cis-pinonic acid ranged from 8 to 370 s. |
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