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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
Author(s) -
Mallet Claude R.,
Mazzeo Jeff R.,
Neue Uwe
Publication year - 2001
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.346
Subject(s) - chemistry , chromatography , tandem , solid phase extraction , tandem mass spectrometry , mass spectrometry , liquid chromatography–mass spectrometry , extraction (chemistry) , throughput , plasma , telecommunications , materials science , physics , quantum mechanics , computer science , composite material , wireless
Abstract 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.