In-line monitoring of esterification using a miniaturised mid-Infrared spectrometer

Littlejohn, D. and McGill, C.A. and Ferguson, R.H. and Nordon, A. and Donoghue, K.G. (2003) In-line monitoring of esterification using a miniaturised mid-Infrared spectrometer. Analyst, 128. pp. 1467-1470. ISSN 0003-2654

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Abstract

A miniaturised mid-infrared (MIR) spectrometer attached directly to an in-line immersion probe with an attenuated total reflectance crystal has been used to monitor the progression of the batch reaction of crotonic acid and 2-butanol in toluene. Univariate calibration, using the signal at 1188 cm−1 in the 2nd derivative spectrum, gave accurate (average error, 1.6%) and precise (average relative standard deviation, 5.2%) estimation of 2-butyl crotonate concentrations in the range 0.08–0.49 mol dm−3. Calibration by partial least squares was of no additional benefit in this application. The performance of in-line MIR spectrometry was comparable to that of an off-line reference gas chromatography method and superior to that of other in-line process analysis techniques (near-infrared, Raman or UV-visible spectrometries).

Author(s):Littlejohn, D., McGill, C.A., Ferguson, R.H., Nordon, A. and Donoghue, K.G.
Item type:Article
ID code:38450
Keywords:Infrared spectrometer, esterification, Chemistry, Biochemistry, Spectroscopy, Environmental Chemistry, Analytical Chemistry, Electrochemistry
Subjects:Science > Chemistry
Department:Faculty of Science > Pure and Applied Chemistry
Depositing user: Pure Administrator
Date deposited:13 Mar 2012 14:43
Last modified:12 Apr 2019 02:04
URI:https://strathprints.strath.ac.uk/id/eprint/38450
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