title: Rapid fluorimetric assay of minocycline in plasma or serum: comparison with microbiological assay.
abstract: 1. Plasma concentrations of minocycline were assayed by measuring the fluorescence emission of an aluminum-minocycline chelate in a spectrofluorimeter. 2. The assay gives reproducible results over the concentration range 0.05-5.0 mug ml-1, and compared favourably with results achieved using a conventional large plate agar diffusion microbiological assay in a double-blind comparison of the two methods. 3. Fluorimetric assay of minocycline in plasma was found to correlate closely with antibiotic activity (r = 0.95). The method is easy and economical to perform, results being obtained in 1 h.
mesh_terms: D001409:Bacillus cereus / Q000187:drug effects; D001681:Biological Assay; D005470:Fluorometry; D006801:Humans; D008722:Methods; D008911:Minocycline / Q000097:blood* / Q000494:pharmacology; D013754:Tetracyclines / Q000097:blood*
chemical_list: D013754:Tetracyclines; D008911:Minocycline