Abstract
A simple, rapid and sensitive liquid chromatography/electrospray tandem mass spectrometry quantitative detection method, using amantadine as internal standard, was developed for the simultaneous analysis of paracetamol, pseudoephedrine and chlorpheniramine concentrations. Analytes were extracted from plasma samples by liquid–liquid extraction with n-hexane–dichloromethane–2-propanol (2:1:0.1, v/v), separated on a C18 reversed-phase column with 0.1% formic acid–methanol (40:60, v/v) and detected by electrospray ionization mass spectrometry in positive multiple reaction monitoring mode. Calibration curves for plasma were linear over the concentration range 10–10,000 ng mL−1 of paracetamol, 2–2,000 ng mL−1 of pseudoephedrine and 0.2–200 ng mL−1 of chlorpheniramine. The method has a lower limit of quantitation of 10 ng mL−1 for paracetamol, 2.0 ng mL−1 for pseudoephedrine and 0.2 ng mL−1 for chlorpheniramine. Recoveries, precision and accuracy results indicate that the method was reliable within the analytical range, and the use of the internal standard was very effective for reproducibility by LC-MS-MS. This method is feasible for the evaluation of pharmacokinetic profiles of a novel multicomponent sustained release formulation containing 325 mg of paracetamol, 30 mg of pseudoephedrine hydrochloride and 2 mg of chlorpheniramine maleate. It is the first time the pharmacokinetic evaluation of a novel sustained-action formulation containing paracetamol, pseudoephedrine and chlorpheniramine has been elucidated in vivo using LC-MS-MS.
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Authors wish to acknowledge the National Natural Science Foundation of China (NSFC, No. 30070898) for financial support.
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Zou, H., Gao, S., Chen, W. et al. Simultaneous Quantitation of Paracetamol, Pseudoephedrine and Chlorpheniramine in Dog Plasma by LC-MS-MS. Chroma 68, 251–257 (2008). https://doi.org/10.1365/s10337-008-0682-7
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DOI: https://doi.org/10.1365/s10337-008-0682-7