title: Thin-layer chromatographic detection of pyrethroid insecticides containing a nitrile group.
abstract: A spray reagent for the detection of pyrethroid insecticides containing a nitrile group by thin-layer chromatography is described. These insecticides on alkaline hydrolysis yield cyanide ion, which in turn reacts with copper(II) acetate and o-tolidine in an acetic acid medium to give a blue colour. Organochlorine, organophosphorus and carbamate insecticides do not interfere. The limit of detection is about 1 microgram.
authors.affiliation: Regional Forensic Science Laboratory, State of Maharashtra, Cantonment, Aurangabad, India.
authors.forename: V B
authors.initials: VB
authors.lastname: Patil
authors.forename: M T
authors.initials: MT
authors.lastname: Sevalkar
authors.forename: S V
authors.initials: SV
authors.lastname: Padalikar
mesh_terms: D002855:Chromatography, Thin Layer / Q000379:methods; D007202:Indicators and Reagents; D007306:Insecticides / Q000032:analysis*; D009570:Nitriles; D011722:Pyrethrins / Q000032:analysis*
chemical_list: D007202:Indicators and Reagents; D007306:Insecticides; D009570:Nitriles; D011722:Pyrethrins; C017160:cypermethrin; C017180:decamethrin; C017690:fenvalerate