Hamzeh Saghafi - Research and Development Laboratory, Samiran Company, Abbas Abad industrial town, Tehran, Iran
Firoozeh Zarkesh - Research and Development Laboratory, Samiran Company, Abbas Abad industrial town, Tehran, Iran
Hassan Kooshyar - CEO of Samiran Company, Ferdowsi square, Alavi Street, Tehran, Iran

In the present study, a new type of a household pesticide was prepared by coacervation method. Lambda-Cyhalothrin was encapsulated due to interaction between two oppositely charged materials, gelatin and gum Arabic in acomplex coacevation process at the presence of 10 mol etoxylated nonyl phenol (NPE) which is a kind of a non-ionicemulsifier to enhance the properties of capsules such as size, shape and homogenization. Spherical shape of capsuleswas scanned by Scanning Electron Microscopy (SEM) and optical microscope. The encapsulation efficiency wasachieved 96% by Gas chromatography equipped with FID detector (GC-FID). From the results of release study, 49, 73,76% of encapsulated materials were released from their shell after 15, 30,180 min respectively. pH adjustment as afactor to start the encapsulation process, cooling and adding glutaraldehyde during the formation of capsules to makethem hardened, are already proved to be significant for preparation of capsules. The present study, applies a convenientmethod to introduce a new product, which can be exploited as a pesticide in public health field.

Lambda-cyhalothrin, coacervation, encapsulation, release study, encapsulation efficiency