title: Analysis of tetracycline antibiotics using HPLC with pulsed amperometric detection.
abstract: The analysis of tetracycline, oxytetracyline, chlortetracycline and doxycycline by high-performance liquid chromatography with pulsed amperometric detection using an anodized boron-doped diamond thin film (BDD) electrode is originally reported. The analyses were carried out using the mobile phase, phosphate buffer (0.01 M, pH 2.5)-acetonitrile (80:20; v/v), on a C18 column (250 x 4.6 mm i.d., 5 microm) at a flow rate of 1.0 mL/min. The optimal PAD waveform parameters at the anodized BDD were 1.5 V (versus Ag/AgCl) detection potential (E(det)) for 290 ms (200 ms delay time and 90 ms integration time), 2.0 V (versus Ag/AgCl) oxidation potential (E(oxd)) for 200 ms oxidation time (t(oxd)) and 0.4 V (versus Ag/AgCI) reduction potential (E(red)) for 200 ms reduction time (t(red)). The proposed method showed the simultaneous determination of tetracycline, oxytetracyline, chlortetracycline and doxycycline with a linear range of 0.1 - 100 microg/mL, detection limits of 0.05 - 0.1 microg/mL and recoveries of 70.8 - 96.0%. The application of this method to real samples was demonstrated and validated using a shrimp sample.
authors.affiliation: Department of Chemistry, Faculty of Science, Chulalongkorn University, Patumwan, Bangkok 10330, Thailand.
authors.forename: Thiraporn
authors.initials: T
authors.lastname: Charoenraks
authors.forename: Suchada
authors.initials: S
authors.lastname: Chuanuwatanakul
authors.forename: Kensuke
authors.initials: K
authors.lastname: Honda
authors.forename: Yoko
authors.initials: Y
authors.lastname: Yamaguchi
authors.forename: Orawon
authors.initials: O
authors.lastname: Chailapakul
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000032:analysis* / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D033364:Decapoda / Q000737:chemistry; D004563:Electrochemistry / Q000379:methods*; D004566:Electrodes; D013754:Tetracyclines / Q000032:analysis* / Q000737:chemistry*
chemical_list: D000900:Anti-Bacterial Agents; D013754:Tetracyclines