A chemical ionization mass spectrometry technique for airborne measurements of ammonia

@inproceedings{Nowak2007ACI,
  title={A chemical ionization mass spectrometry technique for airborne measurements of ammonia},
  author={John B Nowak and Jonathan A. Neuman and Kenji Kozai and L Gregory Huey and David J. Tanner and John Shawe-TaylorRoyal Holloway and Thomas B Ryerson and Gregory J. Frost and Stuart A McKeen and Fred C. Fehsenfeld},
  year={2007}
}
[1] A chemical ionization mass spectrometer (CIMS) utilizing protonated acetone dimer ion chemistry to measure gas-phase ammonia (NH3) from the NOAA WP-3D aircraft is described. The average sensitivity determined from in-flight standard addition calibrations ranged from 2.6 to 5 ion counts s 1 pptv , depending on flow conditions, for 1 MHz of reagent ion signal. The instrument time response was determined to be 5 s from the 2 e-folding signal decay time after removal of a standard addition… CONTINUE READING