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 th emacroreticular 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 thes analytes were studied and the reaction conditions were optimized. Compatibilty 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.
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