COMPARATIVE-STUDY OF SOLID-PHASE EXTRACTION OF PHENOLIC-COMPOUNDS - INFLUENCE OF THE ION-PAIR REAGENT

A comparative study of the solid phase extraction of phenolic compound s in water was carried out. Three different sorbents, C18, CH and PLRP -S, were tested for the preconcentration process in order to determine phenolic compounds in water at mu g l(-1) levels by reversed-phase LC separation and diode-array detection. The addition of an ion-pair rea gent in the extraction process was also studied in order to increase t he breakthrough volume of some compounds. Using the optimized conditio ns the limit of detection was less than 0.5 mu g l(-1), the maximum ad missible concentration (MAC) in drinking water. The method was applied to determine phenolic compounds in Ebro river water however no phenol s were found within the detection limits of the method.