In order to achieve highly gas sensing ability, wavelength modulation spectroscopy technique is widely adopted to achieve high signal-to-noise ratio (SNR).
Ma, "High-sensitive carbon disulfide sensor using wavelength modulation spectroscopy in the mid-infrared fingerprint region," Sensors and Actuators B: Chemical, vol.
Wavelength modulation spectroscopy
technique is used to obtain maximum sensitivity .
Cardona, Modulation Spectroscopy
, Academic Press, New York and London, 1969.
SGS Life Science Services has installed and validated instrumentation which uses frequency modulation spectroscopy
(FMS) for headspace oxygen analysis of biopharmaceutical container closure systems, as well as imaged capillary isoelectric focusing (icIEF) for analysis of charge distribution and heterogeneity in biopharmaceuticals, at its facility in Mississauga, Canada.
The LI-7700 Open Path Methane Analyzer from LI-COR Biosciences, Lincoln, Neb., and Southwest Sciences Inc., Santa Fe, N.M., is designed to perform methane density measurements in situ with high resolution using the principle of wavelength modulation spectroscopy