title: Solid-supported reagents for the simultaneous extraction and derivatization of carboxylic acids from aqueous matrices. Studies on optimization of reaction conditions.
abstract: Solid-supported reagents for affecting a simultaneous extraction and derivatization of lipophilic and hydrophilic carboxylic acids from aqueous matrices were further investigated. The reagent consisted of pentafluorobenzyl bromide impregnated on the macroreticular resin XAD-2. New impregnation methods were developed which reduced the amount of pentafluorobenzyl bromide required and which were compatible with existing methods that utilize XAD-2 as an adsorbant. Factors affecting pentafluorobenzylation of these analytes were studied and the reaction conditions were optimized. Compatibility with simple biological samples was demonstrated using arachidonic acid as a model. Evidence was obtained suggesting that metal ions on the resin may be catalytic factors.
mesh_terms: D001095:Arachidonic Acids / Q000097:blood; D001792:Blood Platelets / Q000032:analysis; D002264:Carboxylic Acids / Q000302:isolation & purification*; D055598:Chemical Phenomena; D002621:Chemistry; D002849:Chromatography, Gas; D006801:Humans; D007202:Indicators and Reagents; D012116:Resins, Plant
chemical_list: D001095:Arachidonic Acids; D002264:Carboxylic Acids; D007202:Indicators and Reagents; D012116:Resins, Plant