Determination of Low Concentrations of Some Antibacterial Substances in Solutions After Contact With Bacteria

Abstract
A liquid-liquid extraction procedure is described for the separation of certain antibacterial substances (hexylresorcinol, chloroxylenol, oxine and chloramphenicol) from their solutions after contact with bacteria, before spectrophotometric analysis. The choice of a suitable organic solvent for a particular drug-bacteria system is discussed. The use of the proposed extraction method permitted concurrent determination of the drug and cell exudate (λ max approximately 260 mμ) in a single solution. The accuracy and validity of the method is demonstrated.
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