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7935658 
Journal Article 
Simultaneous NP TLC Analysis of the Sunscreens Diethylamino Hydroxybenzoyl Hexyl Benzoate and Octyl Methoxycinnamate 
Sobanska, AW; Brzezinska, E 
2011 
Yes 
Journal of Planar Chromatography - Modern TLC
ISSN: 0933-4173 
24 
3 
227-231 
English 
WOS:000292061800010 
A simple, rapid, and effective method for TLC separation of two EU-authorized UV filters octyl methoxycinnamate (OMC) and diethylamino hydroxybenzoyl hexyl benzoate (DHHB) on silica gel 60 is proposed. Separation conditions were optimized and cyclohexane-diethyl ether-acetone 15:1:2 (ν/ν) was used as mobile phase. Quantification of both filters on the same chromatographic plates was achieved by densitometric scanning in absorption-reflectance mode at 300 and 360 nm, respectively. The method enabled separation of other UV-absorbing ingredients commonly found in cosmetic sunscreen preparations, for example parabens or ethylhexyltriazone (ET). Good quality, linear calibration plots were generated over the range 200-2000 ng per spot both for OMC and DHHB. The method was validated. Akadémiai Kiadó, Budapest. 
Sunscreen analysis; Diethylamino hydroxybenzoyl hexyl benzoate; Octyl methoxycinnamate; TLC; Spectrodensitometry