modulation spectroscopy

modulation spectroscopy

[‚mäj·ə′lā·shən spek′träs·kə·pē]
(spectroscopy)
A branch of spectroscopy concerned with the measurement and interpretation of changes in transmission or reflection spectra induced (usually) by externally applied perturbation, such as temperature or pressure change, or an electric or magnetic field.
References in periodicals archive ?
Tenders are invited for Development Of Algorithm For Concentration/Pressure/Temerature Measurement Of A Gas, Using Wavelength Modulation Spectroscopy (Wms)
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.
is designed to perform methane density measurements in situ with high resolution using the principle of wavelength modulation spectroscopy (WMS).