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Assay of vecuronium in plasma using solid-phase extraction, high-performance liquid chromatography and post-column
J E Paanakker1, J M Thio, H M Van den Wildenberg
1Organon International B.V., Scientific Development Group, Oss, The Netherlands.
Abstract:
An assay has been developed and validated for the routine monitoring of vecuronium in plasma. It consists of solid-phase extraction using C18 disposables as sample pre-treatment, high-performance liquid chromatography and post-column ion-pair extraction with fluorimetric detection. The fluorescent anion 9,10-dimethoxyanthracene-2-sulphonate (DAS) is used as the counter ion. The detection limit is ca. 5 ng/ml in plasma with a signal-to-noise ratio of 10. The assay is also applicable for monitoring vecuronium and its potential metabolites in other biological media, e.g., urine, bile and tissue (liver, kidney) homogenates.