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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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).
| Creators(s): |
Littlejohn, D.  ORCID: https://orcid.org/0000-0002-1555-9427, McGill, C.A., Ferguson, R.H., Nordon, A. ORCID: https://orcid.org/0000-0001-6553-8993 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: | 20 Jan 2021 17:47 |
| URI: | https://strathprints.strath.ac.uk/id/eprint/38450 |
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