Determination of sodium cromoglycate in human plasma by liquid chromatography with tandem mass
- 27 May 2008
- journal article
- research article
- Published by Wiley in Biomedical Chromatography
- Vol. 22 (9), 1021-1027
- https://doi.org/10.1002/bmc.1022
Abstract
A sensitive and selective liquid chromatography–tandem mass spectrometric (LC–MS/MS) method was developed and validated for the determination of sodium cromoglycate (SCG) in human plasma after a nasal dose of 10.4 mg sodium cromoglycate nasal spray, using pravastatin sodium as the internal standard. The method was validated over a linear range of 0.300–20.0 ng/mL. SCG and I.S. were extracted from 1.0 mL of heparinized plasma by C18 solid‐phase extraction cartridges using methanol as eluting solvent. The dried residue was reconstituted with 100 µL of mobile phase, and 10 µL was injected onto the LC–MS/MS system. Chromatographic separation was achieved on a C18 column (250 × 4.6 mm i.d., 5 µm particle size) with a mobile phase of methanol–acetonitrile–water (containing 2 mmol/L ammonium acetate; 42.5:42.5:15, v/v/v) at a flow rate of 0.4 mL/min. The analytes were detected with a triple quad LC‐MS/MS using ESI with positive ionization. Ions monitored in the multiple reaction monitoring mode were m/z 469.0 (precursor ion) to m/z 245.0 (product ion) for SCG and m/z 447.2 (precursor ion) to m/z327.1 (product ion) for pravastatin sodium (internal standard) The average recovery of SCG from human plasma was 94.88% and the lower limit of quantitation was 0.3 ng/mL. Results from a 3‐day validation study demonstrated excellent precision and accuracy across the calibration range of 0.3–20 ng/mL. The method was successfully applied to the pharmacokinetic study of SCG in healthy Chinese volunteers. Copyright © 2008 John Wiley & Sons, Ltd.Keywords
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