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Ducharme, J. et al.

Rapid and simple method to determine chloroquine and its desethylated metabolites in human microsomes by high-performance liquid chromatography with fluorescence detection.

A sensitive and selective method was developed for the simultaneous determination of chloroquine (CQ) and its desethylated metabolites monodesethylchloroquine (DCQ) and bisdesethylchloroquine (BDCQ) in human liver microsomes. Analytes were separated on a C1 column using methanol-water (70:30, v/v) and triethylamine (0.1% v/v) as the mobile phase. The fluorescence detector was set at 250 (excitation) and 380 nm (emission). Following protein precipitation with ice-cold acetonitrile, microsomal incubation supernatants were directly injected into the HPLC system. Typically, 200 microl of incubate were diluted with 200 microl of acetonitrile and 15 microl were injected. The limit of quantitation was 78 nM of CQ or metabolite. Intra-day variability averaged 2.9% for CQ, 1.5% for DCQ and 2.5% for BDCQ. Inter-day variability was 3.1% for CQ, 3.5% for DCQ and 3.7% for BDCQ. Mean accuracies were 100% for CQ and BDCQ and 102% for DCQ.[1]

References

Rapid and simple method to determine chloroquine and its desethylated metabolites in human microsomes by high-performance liquid chromatography with fluorescence detection. Ducharme, J., Farinotti, R. J. Chromatogr. B Biomed. Sci. Appl. (1997) [Pubmed]

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