Llorent-Martínez EJ, Ortega-Barrales P, Molina-Díaz A, Ruiz-Medina A. Implementation of terbium-sensitized luminescence in sequential-injection analysis for automatic analysis of orbifloxacin.
Anal Bioanal Chem 2008;
392:1397-403. [PMID:
18958455 DOI:
10.1007/s00216-008-2434-9]
[Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2008] [Revised: 09/19/2008] [Accepted: 09/23/2008] [Indexed: 11/30/2022]
Abstract
Orbifloxacin (ORBI) is a third-generation fluoroquinolone developed exclusively for use in veterinary medicine, mainly in companion animals. This antimicrobial agent has bactericidal activity against numerous gram-negative and gram-positive bacteria. A few chromatographic methods for its analysis have been described in the scientific literature. Here, coupling of sequential-injection analysis and solid-phase spectroscopy is described in order to develop, for the first time, a terbium-sensitized luminescent optosensor for analysis of ORBI. The cationic resin Sephadex-CM C-25 was used as solid support and measurements were made at 275/545 nm. The system had a linear dynamic range of 10-150 ng mL(-1), with a detection limit of 3.3 ng mL(-1) and an R.S.D. below 3% (n = 10). The analyte was satisfactorily determined in veterinary drugs and dog and horse urine.
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