(Applied Spectroscopy, 2004) Harman, Thomas L.; Curl, Robert F.; Tittel, Frank K.; Chen, Jinhai
Formaldehyde in ambient air was detected during three periods from July 20-September 25, 2002 in the Houston Area. A laser spectrometer based on difference-frequency generation operating at 3.53 microns was used to quantify HCHO with a precision of 0.5 ppbV.