SCHEDULED MAINTENANCE
Samples of the sulphates of polymyxin B and polymyxin E (colistin) have been assayed microbiologically. The content of phenylalanine was determined in the samples of polymyxin B. The compositions of the samples obtained by using thin-layer chromatography, gas-liquid chromatography and high-performance liquid chromatography were compared. The relative merits of each method are discussed.
A. H. Thomas, J. M. Thomas and I. Holloway, Analyst, 1980, 105, 1068 DOI: 10.1039/AN9800501068
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