Cooperative Institute for Research in Environmental Sciences

Analytical Chemistry Seminar: Henning Finkenzeller and Rainer Volkamer

Analytical Chemistry Seminar: Henning Finkenzeller and Rainer Volkamer

Jointly sponsored by the Department of Chemistry and Biochemistry, CIRES, and the Environmental Program

CE-DOAS at its Detection Limit

by Henning Finkenzeller - 1st Year Graduate Student, Department of Chemistry and Biochemistry, University of Colorado Boulder

Cavity Enhanced Differential Optical Absorption Spectroscopy (CE-DOAS) is an established method for the in-situ measurement of trace gas concentrations. Its detection limit is often not determined by noise but systematical effects.

I comment on the combined effect of high frequency intensity variations and the non-linearity of the spectrometer in intensity space on the detection limit, which is estimated from model calculations.
I also present the new calibration method ICOM (Integrated Calibration by means of Optical Modulation) for the determination of light path lengths in optical resonators, which is promising because of its high performance concerning spectral resolution, absolute accuracy and precision.. 

Title and Abstract Forthcoming

by Rainer Volkamer - Professor of Chemistry and Biochemistry & CIRES Fellow, University of Colorado Boulder

location

CIRES Fellows Room, Ekeley S274

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