title: Retention of polycyclic aromatic hydrocarbons on an improved tetrachlorophthalimidopropyl silica.
abstract: An improved synthesis of a chemically bonded electron acceptor, namely tetrachlorophthalimidopropyl silica, is described. Factors governing the silane preparation and its bonding to silica have been studied, namely reaction temperature and duration, pretreatment of silica, specific area, pore diameter, washing of the bonded silica, influence of solvent drying. A ligand density of 2.7 mumol/m2 is obtained with reduced plate heights in the range 5-20 which demonstrate the absence of polymerization. The retention of six polycyclic aromatic hydrocarbons has been studied. The minimum capacity factors allow high recovery rates in non-polar media.
mesh_terms: D002853:Chromatography, Liquid; D007202:Indicators and Reagents; D007475:Ion Exchange Resins; D011083:Polycyclic Compounds / Q000302:isolation & purification*; D012821:Silanes / Q000138:chemical synthesis; D013696:Temperature
chemical_list: D007202:Indicators and Reagents; D007475:Ion Exchange Resins; D011083:Polycyclic Compounds; D012821:Silanes