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Applied Spectroscopy

Applied Spectroscopy

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  • Vol. 47, Iss. 10 — Oct. 1, 1993
  • pp: 1623–1625

Shifting of -OH Absorption Bands on NIR Spectra of Esters

Wei G. Hansen

Applied Spectroscopy, Vol. 47, Issue 10, pp. 1623-1625 (1993)


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Abstract

The hydroxyl value is an indicator for the stages of esterification reaction. Instead of the wet chemistry titration method, the near-infrared (NIR) spectroscopic technique was utilized to monitor the hydroxyl values during the reaction. Because of the various raw materials and reaction conditions, the shifting of the -OH absorption band in the NIR spectra of esters was observed. The molecular structure, the reaction environment, and the state of the -OH groups are the most likely parameters responsible for the shifting of the -OH band.

Citation
Wei G. Hansen, "Shifting of -OH Absorption Bands on NIR Spectra of Esters," Appl. Spectrosc. 47, 1623-1625 (1993)
http://www.opticsinfobase.org/as/abstract.cfm?URI=as-47-10-1623


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