HPTLC determination of caffeine in stimulant herbal products and power drinks

被引：43
|
作者：
Abourashed, EA [1 ]
Mossa, JS [1 ]
机构：
[1] King Saud Univ, Coll Pharm, Dept Pharmacognosy, Riyadh 11451, Saudi Arabia
来源：
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS | 2004年 / 36卷 / 03期
关键词：
HPTLC; caffeine; dietary supplements; herbal products; energy drinks;
D O I：
10.1016/j.jpba.2004.06.029
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The caffeine content of selected herbal products and energy drinks available in the Saudi market was determined by HPTLC-UV densitometric analysis. Pre-coated HPTLC silica gel plates (20cm x 10cm) were used for the analysis. The solvent system consisted of ethyl acetate-methanol (85:15, v/v), and caffeine was detected at 275 nm. The developed method was validated for specificity, repeatability (C.V. < 5%). recovery (98.90 +/- 3.46). and accuracy (99.84 +/- 2.87). The levels of caffeine were 4.76-13.29% (w/w) and 0.011-0.032% (w/v), for the herbal products and the energy drinks, respectively. (C) 2004 Elsevier B.V. All rights reserved.
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页码：617 / 620
页数：4
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