Evaluation of several solid phase extraction liquid chromatography/tandem mass spectrometry on-line configurations for high-throughput analysis of acidic and basic drugs in rat plasma
Article first published online: 6 JUN 2001
Copyright © 2001 John Wiley & Sons, Ltd.
Rapid Communications in Mass Spectrometry
Volume 15, Issue 13, pages 1075–1083, 15 July 2001
How to Cite
Mallet, C. R., Mazzeo, J. R. and Neue, U. (2001), Evaluation of several solid phase extraction liquid chromatography/tandem mass spectrometry on-line configurations for high-throughput analysis of acidic and basic drugs in rat plasma. Rapid Commun. Mass Spectrom., 15: 1075–1083. doi: 10.1002/rcm.346
- Issue published online: 6 JUN 2001
- Article first published online: 6 JUN 2001
- Manuscript Accepted: 8 MAY 2001
- Manuscript Revised: 7 MAY 2001
- Manuscript Received: 19 MAR 2001
Several configurations using 6- and 10-port switching valves were studied for high flow, on-line extraction of rat plasma coupled to an electrospray triple quadrupole mass spectrometer. Each plasma sample was diluted 1:1 with an aqueous internal standard solution. The sample was injected into a 2.1 × 20 mm cartridge column packed with 25 µm divinylbenzene/N-vinylpyrrolidone packing using 100% aqueous mobile phase at 4 mL/min. After sample loading and sample cleanup, the analytes were eluted from the extraction column with a 1.0-min gradient at 0.4 mL/min. The samples were either analyzed directly after elution from the extraction column or after additional separation using a short high performance liquid chromatography (HPLC) column. The different configurations were tested using an acidic drug (diflunisal) and a basic drug (clemastine) in rat plasma. On-line analysis was performed by injecting 200 µL of diluted plasma. The mass spectrometer was operated in the multiple reaction monitoring (MRM) mode. All calibration standards gave relative standard deviations (RSDs) below 5%. The total time per sample was 3 min. Copyright © 2001 John Wiley & Sons, Ltd.