SIMULTANEOUS DETERMINATION OF ACTIVE INGREDIENTS IN COMMERCIAL INSECTICIDE FORMULATIONS BY CAPILLARY GC

A capillary GC method was developed for the determination of 21 active ingredients, including nine pyrethroidal insecticides, in the commerc ially available insecticide formulations (aerosol, mosquito coil and m at). These active ingredients were separated on a DB-17 fused silica c apillary column (0.53 mm i.d. and 30 m in length), and determined at 1 00-->260-degrees-C using benzyl benzoate as an internal standard. When d-tetramethrin and d-phenothrin were admixed in insecticide formulati ons they could not be separated from each other, but could be separate d on a DB-23 fused silica capillary column (0.53 mm i.d. and 15 m in l ength). The results of this determination agreed with those obtained u sing packed columns.