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1628433 
Technical Report 
High-pressure liquid chromatography of a new pyrethroid insecticide, sumicidin 
Mourot, D; Delepine, B; Boisseau, J; Gayot, G 
1979 
PESTAB/79/1232 
Chromatogr 
1 
PESTAB. The HPLC analysis of the new pyrethroid insecticide, sumicidin, was performed under two systems which are described: a reversed phase system, and one involving adsorption chromatography. In the reversed-phase system, isocratic elution was performed with acetonitrule: aqueous 1% sulfuric acid (70:30). The isocratic elution of the silica gel column in the adsorption chromatography system was hexane: isopropyl ether (90:10). A flow rate of 80 ml/hr was used in a Varian LC 8500 HPLC system with the variable-wavelength UV detector set at 235 nm. The columns used were both 15 cm x 4.7 mm I.D.; one was of LiChrosorb RP-8 (particle size 10 mum), and the other of LiChrosorb Si-60 (particle size 5 mum). Results showed that on the RP-8 column the sumicidin di-asterio isomers were inseperable. The silica gel column gave complete separation of the sumicidin isomers, and no interference by alkylbenzenes was observed. This method may be used for the quantitative analysis of sumicidin in raw materials, and it does not suffer from thermal decomposition of the compount that may occur in gas-liquid chromatographic methods.