title: Ultrasensitive assay of azithromycin in medicine and bio-fluids based on its enhanced luminol-H(2)O(2) chemiluminescence reaction using flow injection technique.
abstract: A simple flow injection chemiluminescence method with synergistic enhancement has been investigated for the rapid and sensitive determination of azithromycin. The synergistic action was significant in the chemiluminescence system of luminol-hydrogen peroxide with azithromycin as an enhancer. The enhanced chemiluminescence intensity was linear with the concentration of azithromycin over the range from 0.1 pg x mL(-1) to 1.0 ng x mL(-1) (r(2=)0.9988) with a detection limit (3sigma) of 0.04 pg x mL(-1). At a flow rate of 2.0 mL x min(-1), a complete analytical process could be performed within 0.5 min, including sampling and washing, with a relative standard deviation of less than 3.0%. The proposed method was applied successfully in the assay of azithromycin in pharmaceutical preparations, human urine and serum without any pre-treatment procedure.
authors.affiliation: Department of Chemistry, Northwest University, Xi'an 710069, China. songzhenghua@hotmail.com
authors.forename: Zhenghua
authors.initials: Z
authors.lastname: Song
authors.forename: Changna
authors.initials: C
authors.lastname: Wang
mesh_terms: D000900:Anti-Bacterial Agents / Q000032:analysis* / Q000737:chemistry / Q000652:urine; D017963:Azithromycin / Q000032:analysis* / Q000737:chemistry / Q000652:urine; D017022:Flow Injection Analysis / Q000379:methods*; D006801:Humans; D006861:Hydrogen Peroxide / Q000737:chemistry*; D007700:Kinetics; D008163:Luminescent Measurements; D008165:Luminol / Q000737:chemistry*; D015394:Molecular Structure; D012680:Sensitivity and Specificity; D012972:Sodium Hydroxide / Q000737:chemistry
chemical_list: D000900:Anti-Bacterial Agents; D012972:Sodium Hydroxide; D008165:Luminol; D017963:Azithromycin; D006861:Hydrogen Peroxide