Spectrophotometric Determination of Propoxur and Carbosulfan with 2,4,6-Trichloroaniline as the Coupling Agent

Abstract

A new spectrophotometric method is described for the determination

of propoxur (O-isopropoxy phenyl, methyl carbamate) and

carbosulfan (2,3-dihydro-2,2-dimethylbenzofuran-7 -yl (dibutylaminothio)

methyl carbamate) by the diazotization-coupling reaction

using 2,4,6-trichloroaniline as the coupling agent.  The phenols

of the insecticides are generated by alkaline hydrolysis. The absorption

maximum of orange coloured species were 443 nm and 440

nm. The coloured species obey Beer's law in the concentration

range 0-10 ppm.