ABSTRACT
OBJECTIVE:To establish the quality standard for Compound Lavandula angustifolia ointment. METHODS:TLC was used for the qualitative identification of ethanol extract from Scutellaria baicalensis and volatile oil of L. angustifolia. GC method was used for qualitative identification of dementholized peppermint oil. GC method was used to determine the content of menthol. The determination was performed on Agilent DB-WAX capillary column,with temperature programming. The injector temperature was 250℃,and the temperature of detector was 250℃.The injection volume was 1 μL and the split ratio was 5:1 by split sampling. RESULTS:TLC spots of ethanol extract of S. baicalensis and volatile oil of L. angustifolia were clear and well-repeated without interference from negative control. The chromatographic peaks in TLC of test samples of dementholized peppermint oil had same retention time as that of substance control.The linear range of menthol injection amount was 0.113 4-1.133 5μg (r=0.999 4). RSDs of precision,intra-day precision,stability and reproducibility tests were not higher than 2.0%. The recoveries were 95.40%-99.82%(RSD=1.61%,n=6). CONCLUSIONS:Established quality standard can be used for the quality control of Compound L.angustifolia ointment.