Abstract
Microdetermination of cartap hydrochloride 2-dimethylaminotrimethylene S, S′-bis(thiocarbamate) hydrochloride in soil was described. Cartap hydrochloride was adsorbed to soil with the effect of functinal groups in the structure. In proposed paper, cartap hydrochloride was extracted from soil at 65°C with 0.1N HCl containing 1.5% L-cysteine hydrochloride. The extract was hydrolyzed with 1.5% NH4OH and oxidized with air to give nereistoxin(4-dimethylamino-1, 2-dithiolane). EPD-gas chromatography using sulfur mode was used to determine cartap hydrochloride without any interference. The minimum detection limit of nereistoxin by this method was 1ng corresponding to 0.005ppm in 20g of soil. The overall average recoveris from alluvial soil and volcanic ash soil were 96.8% and 98.0%, respectively. This conventional method will be useful for the residue analysis of cartap hydrochloride in soil.
