Abstract

A Raman multichannel system is described which is feasible for the on-line identification of fractions separated by gas chromatographic columns. In Raman multichannel systems, the sensor, i.e., the laser focus, is small enough and the possible recording times are short enough to avoid any affliction of the separation process, even with capillary columns in use. At the measurements described, capillary columns with a length of 15 m and an inner diameter of 0.25 mm were employed. The detection limit was at about 1 to 10 nl of one fraction corresponding to about 1 to 10% of the total amount of sample suited for capillary columns.

Stand-off Raman spectrometer for identification of liquids in a pressurized gas pipelines

Michael Foster, Jonathan Storey, Paul Stockwell, and David Widdup
Opt. Express 23(3) 3027-3034 (2015)

Multipass optical system for a Raman gas spectrometer

Dmitry V. Petrov
Appl. Opt. 55(33) 9521-9525 (2016)

Quantitative analysis of metabolic gases by multichannel raman spectroscopy: use of a newly designed elliptic–spherical integration type of cell holder

H. Yamamoto, H. Uenoyama, K. Hirai, X. Dou, and Y. Ozaki
Appl. Opt. 37(13) 2640-2645 (1998)

Design Criteria for a Raman Spectrometer

C. D. Allemand
Appl. Opt. 9(6) 1304-1311 (1970)

Laser-Excited Rotation–Vibration Raman Scattering in Ultra-Small Gas Samples*

J. J. Barrett and N. I. Adams
J. Opt. Soc. Am. 58(3) 311-319 (1968)