PIT-MS
Principle of the Measurement:
1. Ionization of VOCs by proton transfer with hydronium ions (H3O+)
2. Detection using a ion-trap mass spectrometer
3. Chemical separation using collision-induced dissociation
Species Measured:
1. Aromatics
2. Biogenic VOCs (isoprene, monoterpenes)
3. Alcohols
4. Ketones
5. Acids
6. Aldehydes
7. Nitriles
8. Peroxy nitrates
9. Dimethyl sulfide
Time response:
10-300 seconds
Detection limit:
100-500 pptv
Manufacturer:
Home-built
Publications:
Online volatile organic compound measurements using a newly developed proton-transfer ion-trap mass spectrometry instrument during New England Air Quality Study - Intercontinental Transport and Chemical Transformation 2004: Performance, intercomparison, and compound identification
C. Warneke, S. Kato, J. A. de Gouw, P. D. Goldan, W. C. Kuster, M. Shao, E. R. Lovejoy, R. Fall, and F. C. Fehsenfeld
Environmental Science & Technology, 39, 5390-5397 (2005).
Development of proton-transfer ion trap-mass spectrometry: On-line detection and identification of volatile organic compounds in air
C. Warneke, J. A. de Gouw, E. R. Lovejoy, P. C. Murphy, W. C. Kuster, and R. Fall
Journal of the American Society for Mass Spectrometry, 16, 1316-1324 (2005).
Two additional advantages of proton-transfer ion trap mass spectrometry
C. Warneke, S. Rosen, E. R. Lovejoy, J. A. de Gouw, and R. Fall
Rapid Communications in Mass Spectrometry, 18, 133-134 (2004).