Abstract
A rapid and simple analysis of dieldrin in soil using ultrasonic extraction was investigated. The results were as follows. Dieldrin in soil could be extracted with acetone without air-drying of soil. Ultrasonic frequency at 45kHz showed relatively high extractability and good reproducibility of dieldrin in soil. Temperature of extraction solution during the period of ultrasonic extraction effected on extractability of dieldrin in soil; Its optimum temperatures were 50 °C for the total dieldrin extracted with acetone and 10 °C for the phytoavailable dieldrin extracted with 50 % MeOH / water. Based on these optimum condition of ultrasonic extraction, we can measure total and phytoavailable dieldrin in soil at short time of analysis.
