Journal of Applied Polymer Science, Vol.81, No.12, 3038-3043, 2001
Solid-phase extraction of phenolic compounds with poly[metalloprotoporphyrin IX]
A highly insoluble metalloporphyrin polymeric material was used as sorbent for the solid-phase extraction of phenolic compounds. Substantial quantities of phenols (40 to 60 mg/g polymer) were absorbed from aqueous solution comparing satisfactorily with other extraction methods. The polymeric phase presented similar K,,, values for the hydrophobic compounds tested such as p-chlorophenol, BPA, p-nitrophenol, and a significant lower value for the more hydrophilic p-aminophenol and cresol. Several metallic complexes of protoporphyrin IX (Co2+ , Cu2+ , Ni2+ , Zn2+, and Fe3+) have been tested. The analytes were extracted with high recoveries at acid and neutral pH values, whereas at pH 10 low recoveries were obtained.