蚊香中拟除虫菊酯挥散性研究

The pyrethroid volatilization rates during the combustion of mosquito coil

目的测试了蚊香不同载体、喷涂药面、点燃方式对拟除虫菊酯在其燃点时挥散率的影响。方法以微烟、无烟、纸质蚊香为载体，通过硅胶柱对蚊香燃点时的烟雾进行收集，通过气相色谱测试硅胶中拟除虫菊酯量并计算挥散率；以无烟蚊香为载体，测试香坯正、反面涂药及涂药面朝上、下点燃时拟除虫菊酯的挥散率。结果蚊香燃点时，Es-生物烯丙菊酯在无烟、微烟、纸质蚊香中挥散率分别约85％～90％、80％～85％、75％-80％；而氯氟醚菊酯的挥散率依次约80％～85％、75％～80％、70％～75％。结论蚊香喷涂药面朝上点燃有助于拟除虫菊酯挥散。

Objective To study the influence of mosqutio coil base, pyrethroid sprayed side and the combustion way of mosquito coil on pyretbroid volatilization rates during the combustion of mosquito coil. Methods Light smoke, non-smoke and paper based mosquito coil were taken as object, the smoke of mosquito coil during the combus- tion was collected by silica gel column, the amount of pyrethroid in silica gel was determined by GC and then volatili- zation rates was calculated; non-smoke mosquito coil was taken as object, the front side or back side of mosquito coil base was respectively sprayed with pyrethroid, mosquito coils combusted with the sprayed side up or down, in all these cases, volatilization rates were determined. Results The volatilization rate of Es-bioallethrin in light smoke, non- smoke, paper based mosquito coil was 85% -90% , 80% -85%, 75% -80% respectively; the volatilization rate of meperfluthrin was 80% -85% ,75% -80% ,70% -75% respectively. Conclusion The volatilization of pyretbroid with the sprayed side up was faster than that of with the sprayed side down. [