ISSN:
0935-6304
Keywords:
tert-Butylcatechol
;
Electrochemical detection
;
Liquid chromatography
;
1,3-Butadiene purification
;
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Amperometric detection is shown to be highly selective and sensitive for the determination of tert-butylcatechol (TBC) added as an antioxidant in the circulating N-methyl-2-pyrrolidone (NMP) used for the purification of 1,3-butadiene by extractive distillation. The separation of TBC from numerous polar and nonpolar species present in the analyte is achieved on a 5-cm reversed-phase C-18 column using acetonitrile-water gradient conditions, both solvent components containing tetrabutyl ammonium dihydrogen phosphate as the amphiphilic modifier. The separation process is optimized for the resolution of TBC from nonpolar hydrocarbons as well as polar compounds, and a complete elution of all species from the column. An applied potential of 0.6 V relative to the Ag/AgCI electrode is found to provide an optimum sensitivity by the amperometric detector. It is also shown that the hydrocarbon content in NMP can be monitored simultaneously by coupling a spectrophotometric detector in series.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/jhrc.1240160704
Permalink