title: Pretreatment of plasma samples by a novel hollow fiber centrifugal ultrafiltrate device for the determination of cefaclor concentrations in human plasma.
abstract: A simple sample preparation method was developed by using a centrifugal ultrafiltration (CF-UF) device with hollow fiber (HF) for the determination of cefaclor in plasma by HPLC. Samples were placed into a homemade device, which was consisted of a glass tube and a U-shaped hollow fiber. The filtrate was withdrawn from the hollow fiber into a syringe after centrifugation and 20 μL was directly injected into the HPLC for analysis. The HPLC method had a linear calibration curve in the concentration range of 6.00×10(-2)-30.7 μg mL(-1)(r=0.9996). The limit of detection (LOD) and limit of quantitation (LOQ) were 0.02 and 0.06 μg mL(-1), respectively. The intra and inter-day precisions (RSD) were 1.7%, 1.2%, 1.0% and 3.6%, 2.5%, 1.9%, respectively, for three concentrations. Assay accuracy was higher than 99.2% and the absolute recovery was 86.8-92.5%. It is feasible to use this novel and low cost device for sample pretreatment for the analysis of cefaclor in plasma.
authors.affiliation: Department of Pharmaceutical Analysis, School of Pharmacy, Hebei Medical University, 361 East Zhongshan Road, Shijiazhuang City, Hebei Province 050017, China.
authors.forename: Jun-Mei
authors.initials: JM
authors.lastname: Li
authors.forename: Cen
authors.initials: C
authors.lastname: Li
authors.forename: Ye
authors.initials: Y
authors.lastname: Jiang
authors.forename: Shu-Meng
authors.initials: SM
authors.lastname: Ren
mesh_terms: D002433:Cefaclor / Q000097:blood*; D005591:Chemical Fractionation / Q000295:instrumentation* / Q000379:methods*; D002851:Chromatography, High Pressure Liquid; D004355:Drug Stability; D006801:Humans; D006863:Hydrogen-Ion Concentration; D016014:Linear Models; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014461:Ultracentrifugation / Q000379:methods*
chemical_list: D002433:Cefaclor