抄録
We examined several points and investigations in analytical process of drins. The results were as follows: In the ultrasonic extraction, the addition of some amounts of organic solvent such as alcohol to extractable water was essential for preventing the loss of aldrin; the addition of 5 % sodium chloride water was also useful for preventing the loss of aldrin due to formation of emulsion in the transfer process of drins from methanol to hexane; the sulfuric acid treatment of drins extract degradated drins such as dieldrin and endrin, while the alkarine treatment was useful for the purification of drins, especially in biological samples such as fat tissues; the loss of drins, especially aldrin was observed during the concentration process using nitrogen gas; and the degradation of endrin was found in the determination by GC/MS, which was considered to be due to contamination and/or degradation on top of capillary column and injection port.
