absorption cell


Also found in: Medical.

absorption cell

[əb′sȯrp·shən ‚sel]
(optics)
A vessel with transparent walls for holding a gas or liquid whose absorptivity or absorption spectrum is to be measured.
References in periodicals archive ?
We presented a spectroscopic method to measure traceable optical path lengths of an absorption cell. We showed that the optical path length of a gas cell can be accurately calibrated comparing absorption spectra using the OPC method.
The absorption cell was filled with a mixture of atmospheric air and carbon monoxide.
(The actual spectra will not be displayed in the final instrument.) In this case, a file containing the spectra of ozone, benzene, toluene, 2-butanone (MEK), and ortho-, para-, and meta-xylene was first created by metering known concentrations of each compound in a stream of air flowing through the instrument's absorption cell. Each spectrum in the file was identified with the compound's name and absorption coefficient.
Figure 2 shows a 3000 ppm [C.sub.2][H.sub.6] absorption spectroscopy that was measured by using a compact multipass absorption cell with an optical path length of 26.4 m [10] at normal atmosphere pressure.
The SRM is a single-mode optical-fiber-coupled absorption cell containing acetylene gas at a pressure of 6.7 kPa (50 Torr).
The wavelength meter uncertainty is periodically checked by comparison with a rubidium absorption cell.