Determination of oxymatrine in Compound Kushen Colon-specific Capsula by capillary electrophoresis / 中草药

Objective To establish an HPCE method for the determination of oxymatrine in Compound Kushen Colon-specific Capsula.Methods Amphetamine sulfate was used as the internal standard.The separation was obtained with silica capillary column(50 cm ? 50 ?m,effective length 45 cm),30 mmol/L phosphate buffer(pH 5.8)at a constant voltage of 20 kV,and temperature at(25?1)℃,the detective wavelength 214 nm.Results The linear determination range was 30—240 ?g/mL and the average recovery and RSD were 99.54% and 1.85%,respectively.Conclusion The method is simple and accurate,and can be used for quality control of Compoud Kusheng Colon-specific Capsula.

Determination of Methanol in Cosmetics by Sulfurous Acid and Basic Fuchsine Colorimetry / 环境与健康杂志

0.05). Beer's law was obeyed when methanol concentration was 0-0.07 mg/ml with the correlation coefficient r=0.986. Conclusion This method was accurate and precise, which was suitable for the determination of methanol in cosmetics containing ethanol or not.