Optical Path Length Calibration: A Standard Approach for Use in Absorption Cell-Based IR-Spectrometric Gas Analysis
Figure 4
Detector signals with an etalon (top) in the beam path, with gas in the cell (bottom), and with both of them (inset), as a function of digital sample points. Data are on the reference cell containing 20 mmol/mol CO2 in nitrogen gas mixture at Pa (bottom).
