Determination of Parabens in Cosmetics by Capillary Electrophoresis
Authors
Kanitta Pongsomsut
department of chemistry, Burapha University
Somsak Sirichai
department of chemistry, Burapha University
Abstract
Analysis of parabens in cosmetic samples by capillary electrophoresis was investigated. The optimized conditions were 50 mM borate buffer (pH 10.0), separation voltage at10 kV, and injection time of 3 sec at 50 mbar. Detection wavelength was set at 290 nm. The separation capillary column was 48.5 cm × 75 µm i.d. The calibration curves of parabens were linear in the range of 2.0-10.0 ppm with R2 > 0.9970. The limit of detection and limit of quantification for parabens were 0.40 ppm and 1.20 ppm, respectively. The recoveries were in the range of 92.18-109.76 %.
