Determination of dinoseb in agricultural products by NPD-GC

A simple method for the determination of dinoseb in agricultural products by capillary GC without methylation was developed. Dinoseb was extracted from grains and beans with acetonitrile, and the solution was washed with hexane. In the case of fruits and vegetables, dinoseb was extracted with acetone-hexane mixture (1:1), and the solution was washed with water. The extract was cleaned up with a silica gel column, and subjected to NPD-GC with a DB-1 widebore capillary column. Recoveries oi dinoseb from agricultural products fortified with 0.05 ppm were 79.2 similar to 87.8%, and the limit of detection was 0.005 ppm.