Near-infrared spectrometers

D.L. Wetzel, A.J. Eilert and J.A. Sweat, Tunable filter and discrete filter near-infrared spectrometers, in Handbook of Vibrational Spectroscopy, J.M. Chalmers and P.R. Griffiths (eds), vol 1, John Wiley Sons, New York, 2002. 

Y. Wang and B.R. Kowalski, Calibration transfer and measurement stabihty of near-infrared spectrometers, Appl. Spectrosc., 46, 764-771 (1992). 

Thomas, RJ., C.A. Barth, D.W. Rusch and R.W. Sanders (1984) Solar mesospheric near-infrared spectrometer measurements of 1.27 mm radiances and inference for mesospheric ozone. Journal of Geophysical Research 89 9569-9580. 

Thomas,R.J., C.A.Barth, G.J.Rottmann, D.W.Rusch, G.RMount, G.M.Lawrence, R.W.Sanders, G.E. Thomas and L.E. Clemens, (1983) Ozone density distribution in the mesosphere (50-90km) measured by SME limb scanning near infrared spectrometer, Geop.Res.,Lett., p. 10,245-248... 

Wetzel, D.L., Eilert, A.J. and Sweat, J.A., Tunable Filter and Discrete Filter Near-Infrared Spectrometers. In Chalmers, J.M. and Griffiths, P.R. (eds), Handbook of Vibrational Spectroscopy, vol 1 John Wiley 8c Sons New York, 2002, pp. 436 52. 

Wang, Y. and Kowalski, B.R., Calibration Transfer and Measurement Stability of Near-Infrared Spectrometers Appl. Spectrosc. 1992, 46, 764-771. 

A mid-infrared absorption instrument generally consists of a Fourier transform design with the same basic components as noted above for the Fourier transform near-infrared spectrometers (broadband light source, Michelson interferometer, and detector optimized for the mid-infrared spectral region.)... 

Future spacecraft missions to solar system objects are primarily being oriented towards remote-sensing experiments, in contrast to the soft-landed in situ experiments and sample-return initiatives during the 1970 s and 1980 s. Because reflectance spectroscopy has become one of the most important investigative techniques in the planetary sciences, current and planned space missions for the 1990 s and 21st century should include visible and near-infrared spectrometers in their instrument payloads. Reflectance spectral measurements from space would provide more favourable viewing geometries, eliminate problems due to telluric water and C02, and improve the resolution of areas scanned on a nearby planetary surface. 

Measurements of the gaseous sulfur dioxide released were obtained with the Total Ozone Mapping Spectrometer (TOMS Krueger, 1983) and with the Solar Backscatter Ultraviolet Spectrometer (SBUV Heath et d., 1983), both carried on the Nimbus 7 satellite. Three instruments on board the Solar Mesosphere Explorer (SME) also revealed features of the cloud the Infrared Radiometer measured the thermal emission from the aerosols, while the Visible and Near Infrared Spectrometers measured the backscat-tered solar radiation. The three instruments are limbscanning and view the atmosphere along the track of the sunsynchronous polar orbit (Barth et d., 1983 Thomas et d., 1983). Ground based and airborne spectro-photometric measurements of sulfur dioxide have also been carried out (Evans and Kerr, 1983). 

The liquid products were quantified by GC-FID (gas chromatograph with flame ionisation detector) and characterised with GC-MS (gas chromatograph with mass spectrometer). The aromatics content was monitored on-line with a near infrared spectrometer that was calibrated by proton nuclear magnetic resonance spectrometry. 

A near-infrared spectrometer (Equinox 55 from Bruker) was used with OPUS software. The near-infrared spectra were recorded in the 4000-8000 cm range. For transmission analysis, polymer coatings (from 50 pm to 2 mm thick) were analyzed after debonding of the coating from the substrate by bending the coated substrate, and background spectra in air were recorded. For each analysis, 128 scans were collected at 4 cm resolution. 

Multivariate optical computing (MOC) is a very recent and innovative strategy to build near-infrared spectrometers. It is based on the creation of... 

M. Alcala, M. Blanco, D. Moyano, N. W. Broad, N. O Brien, D. Eriedrich, R Pfeifer, and H. W. Siesler, Qualitative and Quantitative Pharmaceutical Analysis with a Novel Handheld Miniature Near-Infrared Spectrometer, J. Near Infrared Spectrosc., 21, 445 (2013). 

R. A. Crocombe, Miniature Optical Spectrometers, in. Conventional and Laboratory Near-Infrared Spectrometers, Spectroscopy, 23,40 (2008). 

A. M. C. Davies and A. Grant, Air-Conditioning-Generated Noise in a Near-Infrared Spectrometer Caused by Fluctuations in Atmospheric Water Vapor, Appl. Spectrosc., 41, 7 (1987). 

R. M. Hammaker, R. A. DeVerse, D. J. Asunskis, W. G. Fateley. Hadamard transform near-infrared spectrometers. In Handbook of Vibrational Spectroscopy, J. M. Chalmers, P. R. Griffiths, eds. John Wiley Sons Ltd., Chichester, West Susses, UK, 1 453-460, 2002. 

J. Psotka, R. Chen, M. Olewnik. Monitoring dough development in real time using a near infrared spectrometer. Paper 293 AACC Annual Meeting, 31 October-3 November, Seattle, WA, 1999. 

S. Okayasu, M. Katayama, S. Miyashiro. Application of near infrared spectrometer to management of the operation of fermentation plant. Kagakukougaku ronnbunnsyu 21 847-851, 1995. (in Japanese)... 

S. W. Coleman, F. E. Barton n, and R. D. Meyer, Calibration of a Near-Infrared Spectrometer for Prediction of Forage Quality, Oklahoma State University A Exper. Station, June 1982, pp. 104—105. 

G. J. Kemeny and D. L. Wetzel, Novel Very High Speed Near-Infrared Spectrometer System, Paper 175, FACSS 13th Annual Meeting, September 28 to October 3, 1986, St. Louis, MO. 

---