A new validated method for the identification and quantification of the sibutramine was developed by HPTLC-densitometry at 225 nm and advantages and disadvantages compared with HPLC-FLD at 225 nm emission and 316 nm excitation. Both methods were applied to the analysis of three natural slimming products in the market for the quantitative analysis of illegally added sibutramine. HPTLC separations were performed on (20 cm × 10 cm) glass HPTLC plates coated with silica gel 60 F(254) using a mobile phase, n-hexane-acetone-ammonia (10:1:0.
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