Abstract

Instrumental resolution has a significant effect on the performance of Fourier transform infrared (FT-IR) spectrometers used for gasphase analysis. Low-resolution FT-IR spectroscopy offers some valuable advantages compared with the traditional high-resolution FT-IR gas-phase spectroscopy, especially in nonlaboratory environments. First, high signal-to-noise ratio (SNR) spectra can be acquired in field conditions without the use of traditional liquid nitrogen-cooled detectors. Second, the dynamic range for quantitative analysis is larger for low-resolution spectroscopy than for high-resolution due to the lower absorbance values and lower noise levels. Third, spectral analysis speed is increased and data storage requirements are substantially reduced. The purpose of this study was to investigate the effect of instrumental resolution on FT-IR gas-phase analysis. The effects of spectral resolution on sensitivity, selectivity, accuracy, precision, spectral overlap, dynamic range, and nonlinearity are separately discussed.

Photoacoustic phase-controlled Fourier-transform infrared spectroscopy

Santeri Larnimaa, Mikhail Roiz, and Markku Vainio
Opt. Continuum 2(3) 564-578 (2023)

New trends in the application of Fourier transform infrared spectroscopy to analytical chemistry

Tomas Hirschfeld
Appl. Opt. 17(9) 1400-1412 (1978)

High-Resolution Fourier Transform Spectroscopy in the Far-Infrared

P. L. Richards
J. Opt. Soc. Am. 54(12) 1474-1484 (1964)

Fourier-transform instrument for high-resolution Raman spectroscopy of gases

Jørgen Bendtsen, Finn Rasmussen, and Svend Brodersen
Appl. Opt. 36(22) 5526-5534 (1997)

Fourier transform and grating-based spectroscopy with a mid-infrared supercontinuum source for trace gas detection in fruit quality monitoring

Khalil Eslami Jahromi, Mohammadreza Nematollahi, Roderik Krebbers, Muhammad Ali Abbas, Amir Khodabakhsh, and Frans J. M. Harren
Opt. Express 29(8) 12381-12397 (2021)