Flow injection chemiluminescence determination of carbaryl using photolytic decomposition and photogenerated tris (2,2′-bipyridyl)ruthenium(III) Original Research Article

A flow injection (FI) system combined with two photochemical processes is developed for the sensitive and rapid determination of carbaryl. It is based on the on-line photo-conversion of carbaryl into methylamine which subsequently reacts with Ru(bpy)33+ generated through the on-line photo-oxidation of Ru(bpy)32+ with peroxydisulphate. The linear concentration range of application was 0.04–4.0 μg ml−1 of carbaryl, with an R.S.D. of 1.2% (for a level of 0.50 μg ml−1) and a detection limit of 0.012 μg ml−1. The sample throughput was 200 injections per hour. The applicability of the method was demonstrated by determining carbaryl in commercial formulations, water, soil, grain and blood serum.