科研之友
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摘要
BACKGROUND: In the pesticides industry, pesticides have different degrees of health hazard, ranging from respiratory exposure to penetration through the skin, the unsafe handling of high viscosity liquid pesticides and the hazardous organic solvents chosen to manufacture the formulated pesticides. Considering all these drawbacks, microencapsulation techniques can be the most efficient way of using pesticides due to their important advantages. In the manufacturing process it is important to choose the best encapsulating agent and to calculate the stoichiometry of the process in order to achieve safety, environmental and economic benefits. In this work, an encapsulation process with beta-cyclodextrin (CD) and pesticides has been developed with maximum recovery. The insecticidal effect has been tested using cockroaches. RESULTS: The stoichiometry of inclusion complexes, from 1:1 to 1:3 for pesticide: beta-cyclodextrin has been calculated by phase solubility analysis and both UV-vis spectrophotometry and capillary zone electrophoresis. The formation of complexes has been confirmed by different physicochemical analysis. On the other hand, the insecticidal effect by contact and inhalation has been allayed due to the protection of insecticide with CD. CONCLUSIONS: The formation of inclusion complexes between pesticides and beta-cyclodextrinmakes a safe, environmental and economically sustainable industrial process.
- 出版日期2014-7
