title: Liquid chromatography of phenylurea herbicides and related compounds on chemically bonded ion-exchange materials.
abstract: The possibilities of using new chemically bonded anion-exchange (Silasorb DEA) and cation-exchange (Silasorb S) materials for high-performance liquid chromatography of phenylurea herbicide compounds were investigated. The columns packed with Silasorb DEA or with Silasorb S ion-exchange materials can be used for efficient separations in normal-phase systems using n-propanol-n-hexane as mobile phases. Here, specific selectivity effects for phenylurea-type herbicides can be achieved in comparison to chromatography on unmodified silica or on chemically bonded aminosilica or cyanosilica, especially with Silasorb S columns. The influence of the mobile phase composition and of the structure of phenylurea herbicides on the chromatographic behaviour on Silasorb S and Silasorb DEA columns was investigated in detail and the possibilities of separation are illustrated by several examples.
mesh_terms: D002851:Chromatography, High Pressure Liquid; D002852:Chromatography, Ion Exchange; D006540:Herbicides / Q000032:analysis*; D007475:Ion Exchange Resins; D010671:Phenylurea Compounds; D013056:Spectrophotometry, Ultraviolet
chemical_list: D006540:Herbicides; D007475:Ion Exchange Resins; D010671:Phenylurea Compounds