title: Rapid and sensitive liquid chromatography/mass spectrometry assay for caspofungin in human aqueous humor.
abstract: A rapid, precise, and sensitive liquid chromatography/mass spectrometry (LC/MS) method to quantify the caspofungin concentration in human aqueous humor was developed and validated. Sample preparation involved simple dilution of aqueous humor samples with acetonitrile. Azithromycin was the internal standard. Good linearity over 10 to 5,000 ng/ml was observed. The lower limit of quantification was 10 ng/ml. The intra- and interday accuracies (percent bias) were within 11%, while the intra- and interday precisions were within 6%.
authors.affiliation: Department of Pharmacy Practice, Centre for Medicine Use and Safety, Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Victoria 3052, Australia.
authors.forename: Chin Fen
authors.initials: CF
authors.lastname: Neoh
authors.forename: Hui
authors.initials: H
authors.lastname: He
authors.forename: Jian
authors.initials: J
authors.lastname: Li
authors.forename: Robert O
authors.initials: RO
authors.lastname: Fullinfaw
authors.forename: Lok
authors.initials: L
authors.lastname: Leung
authors.forename: Anant
authors.initials: A
authors.lastname: Misra
authors.forename: Rasik B
authors.initials: RB
authors.lastname: Vajpayee
authors.forename: Geoffrey E
authors.initials: GE
authors.lastname: Davies
authors.forename: Kay
authors.initials: K
authors.lastname: Stewart
authors.forename: David C M
authors.initials: DC
authors.lastname: Kong
mesh_terms: D001082:Aqueous Humor / Q000737:chemistry*; D017963:Azithromycin / Q000032:analysis / Q000378:metabolism; D000077336:Caspofungin; D002853:Chromatography, Liquid / Q000379:methods*; D054714:Echinocandins / Q000032:analysis* / Q000378:metabolism*; D006801:Humans; D055666:Lipopeptides; D013058:Mass Spectrometry / Q000379:methods*; D012015:Reference Standards; D015203:Reproducibility of Results
chemical_list: D054714:Echinocandins; D055666:Lipopeptides; D017963:Azithromycin; D000077336:Caspofungin