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Quantitative analysis of a mixture of cresols by carbon-13 NMR spectroscopy

✍ Scribed by Hung-Cheh Chiang; Long-Jin Lin

Publisher
John Wiley and Sons
Year
1979
Tongue
English
Weight
234 KB
Volume
12
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

The suitability of ^13^C NMR as a technique for determining o‐, m, and p‐cresols in their mixtures was investigated. Spectra were determined in methanol, containing o‐toluidine as an internal standard, without nuclear Overhauser suppression. Ratios of peak areas of each cresol isomer to o‐toluidine were determined by means of the standard calibration method, and then mixtures of cresol isomers were prepared and quantified in varying concentrations from 8.30 to 66.84 mol% for each isomer, with an average absolute error of 0.78% for all isomers. The method described was convenient and the results were generally satisfactory.

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