كليدواژه :
حشره كش ها , ليندن , ديازينون , برنج , مواد غذايي , كرواتوگرافي
چكيده لاتين :
Many investigations concerning the residue of insecticides on foodstuff have been conducted in the developed countries during the last two decades, but unfortunately in our country, despite consumption of insecticides, there have only a few studies on this field. In most rice fields in Mazandaran Province, Lindane and Diazinon are applied to control Ephydra spp, Gryllotalpa gryllotalpa and Chilo spp. Taking into consideration the application of these insecticides in the rice fields in the north region of our country, this investigation was carried out on the rice plant and rice granules in order to get the necessary information from the concentration of insecticides residual, when the rice consumed 177 samples were provided in 4 areas of Nashtarood in the Tonekabon city in 1999. Samples were analyzed by Thin - Layer - Chromatography method, in order to determine the quantity of Lindane and Diazinon. The results showed that in 2 out of 4 studied areas Lindane was measured 0.1 ppm at the end of 4th month, and Diazinon showed in I out of 4 areas (Tameshcol 2) approx 1 ppm in the 4th month. This study cleared that the physical and chemical properties of the studied insecticides, such as fumigation quality, ecological conditions and type of soil, cease the decrease and finally disappearence of insecticides during the period of plant growth. While period of being in store after harvest and seperation of rice from the rice product, play a fundamental role in residue of these insecticides.
