title: Modified high-performance liquid chromatographic method for the determination of ertapenem in human urine: enhanced selectivity and automation.
abstract: A column-switching, reversed-phase high-performance liquid chromatographic (HPLC) assay for a new structurally unique carbapenem antibiotic, ertapenem, in urine has been improved for selectivity and automated using a Packard MultiPROBE II EX pipetting station. The method uses column-switching for on-line extraction of the urine sample. The extraction column, analytical column, mobile phase, and timing of the column-switching valve have been changed to enhance selectivity for the analyte over endogenous background material. Sample transfer and dilution prior to direct-injection into the HPLC system have been accomplished using a Packard MultiPROBE II EX robotic liquid handling system.
mesh_terms: D000900:Anti-Bacterial Agents / Q000652:urine*; D001331:Automation; D002138:Calibration; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D000077727:Ertapenem; D006801:Humans; D007769:Lactams; D016014:Linear Models; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013056:Spectrophotometry, Ultraviolet; D047090:beta-Lactams
chemical_list: D000900:Anti-Bacterial Agents; D007769:Lactams; D047090:beta-Lactams; D000077727:Ertapenem