A Novel Enhanced Chemiluminescence System with Ag(III) Complex for the Determination of Ofloxacin and Levofloxacin in Pharmaceutical Preparation and Biological Fluid

Flow Injection-Chemiluminescence Method for Determination of Hyoscine Butylbromide Using Silver(III) as Oxidizing Agent

Diperiodatoargentate(III) (DPA)/silver(III) complex, [Ag(HIO₆)₂]^5-, in sulfuric acid medium has been used to determine hyoscine butylbromide (HBB) by flow injection (FI) coupled with chemiluminescence (CL) detector. A linear standard curve between the CL intensity and concentration range from 0.005 to 20 mg L^-1 was obtained. The determination coefficient (R²), limit of detection (3s × blank), relative standard deviation (RSD) for 0.5 mg L^-1 HBB and analytical throughput were 0.9992 (n = 8), 5 × 10^-4 mg L^-1, 1.5% (n = 10) and 160 injections h^-1, respectively. The developed method was applied for the determination of HBB in pharmaceutical formulations with recoveries from 92 ± 4 to 108 ± 3%. For comparison, a spectrophotometric method was used and the results obtained by both methods were in good agreement at a 95% confidence level. The effect of key chemical and physical variables (reagent concentration, flow rate, sample volume, PMT voltage) and interfering species (pharmaceutical excipients and inorganic ions) on the determination of HBB was examined. The possible CL mechanism of HBB on silver(III) complex in sulfuric acid medium was also discussed in brief.

Flow analysis with chemiluminescence detection: Recent advances and applications

This article highlights the most important developments in flow analysis with chemiluminescence (CL) detection, describing different flow systems that are compatible with CL detection, detector designs, commonly applied CL reactions and approaches to sample treatment. Recent applications of flow analysis with CL detection (focusing on outputs published since 2010) are also presented. Applications are classified by sample matrix, covering foods and beverages, environmental matrices, pharmaceuticals and biological fluids. Comprehensive tables are provided for each area, listing the specific sample matrix, CL reaction used, linear range, limit of detection and sample treatment for each analyte. Finally, recent and emerging trends in the field are also discussed.