Determination of Doxycycline, Tetracycline and Oxytetracycline Simultaneously by Tlc-Fluorescence Scanning Densitometry
作者:
Hong-zhi Xie,
Chuan Dong,
Yu-lin Fen,
Chang-song Liu,
期刊:
Analytical Letters
(Taylor Available online 1997)
卷期:
Volume 30,
issue 1
页码: 79-90
ISSN:0003-2719
年代: 1997
DOI:10.1080/00032719708002292
出版商: Taylor & Francis Group
关键词: Doxycycline;Tetracycline and Oxytetracycline;TLC-fluorescence densitometry
数据来源: Taylor
摘要:
A new sensitive, fast thin layer chromatography-fluorescence scanning densitometry(TLC-F) method is described for the simultaneous determination of doxycycline(DOTC), tetracycline(TC) and oxytetracycline(OTC). With a mobile phase chloroform: methanol:acetone: 1% aqueous ammonia(10:22:50:18, V/V) and a silica gel thin-layer, previously treated with 0.27 mol/L sodium EDTA solution adjusted to pH 9.0, all the tetracyclines were separated from each other. The Rf values are 0.52,0.35,0.21 for DOTC, TC and OTC, respectively. The fluorescent spots were scanned with a spectrodensitometer using 365nm as the excitation wavelength and the cut-off filter was set at 440nm. The linear ranges are 0.50∼25.6ng for DOTC; 0.96∼96.2ng for TC and 0.50∼49.6ng for OTC. The relative standard deviations(RSDs) are all <3.5%. The recoveries of them in honey, serum and urine are 94.5%∼107%.
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