10%杠柳根皮提取物微乳剂的研制

10% Microemulsion of Extracts fromPeriploca sepium

通过对溶剂、助表面活性剂和乳化剂的筛选，成功配制出10％杠柳根皮提取物微乳剂。所制微乳剂成分为：w=10％的杠柳根皮浸膏，w=5％的DBca，w=10％的农乳400，w=21％的甲醇。w=12％的环己酮，其余用水补足至100％。主要技术指标：杠柳根皮浸膏质量分数10％，其中有效成分杠柳新苷T的质量分数为0．08％；外观为黄色透明均相液体；pH为5～8；透明温度范围为=5～70℃；与水可以任意比互溶；制剂反复冷冻后，在室温下能自行恢复为透明均相液体；（54±2）℃的条件下，贮存14d，杠柳新苷T的分解率为4．8％（〈8％）。各项技术指标均符合商品农药的要求，田间药效表明该制剂对菜青虫有较好的防效，具有推广价值。

The studies of processing to microemulsion （ME） had been carried out. By choosing the op timal organic solvents, co-surfactant, and surfactant system for ME, Periploca sepium 10% ME were successfully developed. ME constitute and ratio are w=10%root bark extract, w=5% DBS-ca, w= 10% PE400, w=21% methanol, w=12yclohexanone, andw=42% water. ME technician inde- xes are as follows： extract content w= 10 %, in which the main insecticidal ingredient periplocoside T content 0.08%; appearance homogeneous yellow transparent liquid; pH 5 to 8; transparent tempera- ture range --5 to 70 ℃ ; miscible with water, no any precipitation and suspension; （54--2） storage 14 days,main active ingredient periplocoside T decomposition rate is 4.8% （less than 8%）. Technical indexes accord with the requirements of commodity pesticide. Field efficacy indicates that the dosage form has good control effect to the cabbage caterpillar , has value of popularization.