不同壁材高效氯氰菊酯微囊悬浮剂在土壤中迁移与光解的差异性  

Research on the differences of the migration in soil and photolysis of different wall materials of microcapsule suspensions of beta-cypermethrin

作　　者：张贵森[1] 杨法辉[1] 郭慧玲[2] 商建[1] 高志山[1] 刘峰[1] 

机构地区：[1]山东农业大学植物保护学院,山东泰安271018 [2]山西大学化学与化工学院,太原030006

出　　处：《农药学学报》2012年第2期214-220,共7页Chinese Journal of Pesticide Science

基　　金：公益性行业(农业)科研专项(200903033)资助

摘　　要：分别制备了以脲醛树脂、密胺树脂、聚氨酯和聚脲为壁材的10%高效氯氰菊酯微囊悬浮剂,采用土壤薄层层析法、紫外光解法和室内自然光照对比法,通过高效液相色谱测定了各微囊悬浮剂在土壤中的迁移以及在紫外光和自然光照下的光解作用。结果表明:在粒径相近的情况下,以水为展开剂时,分别以聚脲、聚氨酯、密胺树脂和脲醛树脂为壁材的微囊悬浮剂的迁移性依次减小;同一壁材的微囊悬浮剂,迁移性随粒径增加而增大;在紫外光照射下,光解速率由大到小依次为高效氯氰菊酯原药,10%高效氯氰菊酯乳油,以及以聚脲、聚氨酯、密胺树脂和脲醛树脂为壁材的微囊悬浮剂,其半衰期分别是2.3、9.4、20.7、39.0、45.8和51.9 h;在自然光照条件下,上述各药剂的半衰期分别是5.8、5.9、6.9、6.7、12.9和17.3 d。将高效氯氰菊酯制备成微囊悬浮剂后其在自然条件下的光解明显低于原药和乳油,可延长其持效期。10% microcapsule suspensions（CS） of beta-cypermethrin were prepared by using urea-formaldehyde resin,melamine-formaldehyde resin,polyurethane and polyurea as wall materials.The migration in soil and the photolysis of beta-cypermethrin in various of microcapsule suspensions were measured by HPLC with soil thin layer chromatography and UV-photolysis methods respectively.The results showed that,using the same particle-size of CS and water as developing solvent,the migration rate of beta-cypermethrin CS were ranked as polyurea,polyurethane,melamine-formaldehyde resin,urea-formaldehyde resin;the rate of the same wall material of the CS was increased along with the increasing of particle-size.Under UV light,the photolysis rate were ranked as beta-cypermethrin technical,EC,microcapsule suspensions which were polyurea,polyurethane,melamine-formaldehyde resin and urea-formaldehyde resin used as the wall materials,and their half-lives were 2.3,9.4,20.7,39.0,45.8 and 51.9 h,respectively.Their half-lives were followed by 5.8,5.9,6.9,6.7,12.9 and 17.3 d under the natural light.The photodegradation rate of CS was significantly lower than technical and EC,so its efficiency period would be extended.

关 键 词：高效氯氰菊酯 微囊悬浮剂 迁移 光解 

分 类 号：TQ450.6[化学工程—农药化工]