Determination of Sodium cromoglycate (cas 15826-37-6) in human plasma by liquid chromatography–mass spectrometry in the turbo ion spray mode
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Add time:09/30/2019 Source:sciencedirect.com
A highly sensitivity liquid chromatography–tandem mass spectrometry method has been developed for the quantitation of Sodium cromoglycate (cas 15826-37-6) (SCG) in human plasma. The method was validated over a linear range of 0.100–50.0 ng/ml, using 13C4 sodium cromoglycate as the internal standard. Compounds were extracted from 1.0 ml of lithium heparin plasma by methanol elution of C18 solid-phase extraction cartridges. The dried residue was reconstituted with 100 μl of 0.01 N HCl, and 30 μl was injected onto the LC–MS–MS system. Chromatographic separation was achieved on a C8 (3.5 μm) column with an isocratic mobile phase of methanol–water–0.5 M ammonium acetate (35:64.8:0.2, v/v/v). The analytes were detected with a PE Sciex API 3000 mass spectrometer using turbo ion spray with positive ionization. Ions monitored in the multiple reaction monitoring (MRM) mode were m/z 469.2 (precursor ion) to m/z 245.1 (product ion) for SCG and m/z 473.2 (precursor ion) to m/z 247.1 (product ion) for 13C4 SCG (I.S.). The average recoveries of SCG and the I.S. from human plasma were 91 and 87%, respectively. The low limit of quantitation was 0.100 ng/ml. Results from a 4-day validation study demonstrated excellent precision (C.V.% values were between 1.9 and 6.5%) and accuracy (−5.4 to −1.2%) across the calibration range of 0.100–50.0 ng/ml.
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