Measurements of concentrations and fluxes of VOCs by PTR-ToF-MS

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Proton affinity ladderC,H,NC,HC,H,OC,H,S
Quantification• PTR-MS is an absolute method. Instrument sensitivity can becalculated.• H 3 O + + VOC VOCH + + H 2 O obeys simple pseudo first-orderkinetics.[ VOC]i(VOCH )i(H O )31kt• VOCs can be quantified within 20 % without using calibrationstandards.• Calibration standards are used to achieve better accuracy: 5 %• Detection limit (2) 0-50 pptV at 1 s signal integration time.
Page 2: PTR-MS / PTR-ToF-MSbasics
Page 8 and 9: A transportable instrument> 230 kg
Page 10 and 11: PTR-TOF Data Analyzer
Page 12 and 13: Application examples• long-term m
Page 14 and 15: Motivation• EMEP intensive measur
Page 16 and 17: The Birkenes observatory
Page 18 and 19: signal [ncps]QA/QC: zeroing16151413
Page 20 and 21: Monoterpenes time seriespreliminary
Page 22 and 23: On-road emission measurementsof VOC
Page 24 and 25: Acetaldehyde emissionsincomplete ox
Page 26 and 27: Acetic acid emissionsmodeled acetic
Page 28 and 29: Reference
Page 30 and 31: Measurement sitesampling line: Tefl
Page 32 and 33: Flux [nmol m -2 s -1 ]1201008060402
Page 34 and 35: Cumulative fluxes
Page 36 and 37: Measurements in atmospheresimulatio
Page 38 and 39: Atmospheric degradation of aminespr
Page 40 and 41: Dimethylamine photo-oxidationcredit
Page 42 and 43: Dimethylamine photo-oxidationPTR-TO
Page 44 and 45: Time response (HT PTR-MS)
Page 46 and 47: Analysis of particles by HT-PTR-MS
Page 48 and 49: Trimethylamine oxidationm/z 44known
Page 50: Credits• PTR-Tof-MS software:- M.

Measurements of concentrations and fluxes of VOCs by PTR-ToF-MS

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