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Determination of terbinafine (Lamisil®) in human hair by microbore liquid chromatography/tandem mass spectrometry
Author(s) -
Majumdar Tapan K.,
Bakhtiar Ray,
Melamed David,
Tse Francis L. S.
Publication year - 2000
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/1097-0231(20000730)14:14<1214::aid-rcm12>3.0.co;2-5
Subject(s) - chemistry , chromatography , formic acid , sodium hydroxide , aqueous solution , electrospray ionization , mass spectrometry , tandem mass spectrometry , electrospray , detection limit , liquid chromatography–mass spectrometry
An analytical method for the determination of terbinafine (Lamisil®) in human hair was developed and validated. Human hair (10 mg) was hydrolyzed in 0.50 mL of 5.0 N sodium hydroxide for 1.5 h. The aqueous layer was extracted with 1.5 mL of n ‐hexane. The organic layer was separated and re‐extracted with 0.20 mL of formic acid (12.5%)/2‐propanol (85:15, v/v). The aqueous layer was separated and 0.010 mL of the aqueous extract was injected onto a reversed‐phase microbore (50 × 1.0 mm i.d.) column for analysis by liquid chromatography/tandem mass spectrometry (LC/MS/MS). The instrument was equipped with an electrospray ionization (ESI) interface and operated in the positive ion mode of detection. Interday and intraday accuracy and precision were assessed from the relative recoveries of spiked samples analyzed on three different days. The method showed excellent specificity and ruggedness with a lower limit of quantitation of 10 ng/g (i.e., 10 ppb) using 10 mg of human hair. Copyright © 2000 John Wiley & Sons, Ltd.