SUPERCRITICAL-FLUID EXTRACTION AND CHROMATOGRAPHY OF AROMATIC-AMINES

Supercritical fluid extraction (SFE) was used for the isolation of ant ioxidant aromatic amines from tyre rubber. The efficiency of SFE was c omparable with that of Soxhlet microextraction. Aromatic amines were a lso extracted from different matrices (inert silanized material, sand and humic soil) with supercritical carbon dioxide. It was found that t he extraction efficiency depends on the nature of the matrix. Whereas the recovery of amines from the inert material approached 100%, that f rom acidic matrices was poor and some amines were not recovered.