Simultaneous Quantification of Fullerenes C[sub.60] and C[sub.70] in Organic Solvents by Excitation–Emission Matrix Fluorescence Spectroscopy

Excitation–emission matrix (EEM) fluorescence spectroscopy of unmodified (pristine) fullerenes C[sub.60] and C[sub.70] in benzene, toluene, and n-hexane at room temperature was used for their quantification by their solvent-dependent EEM bands specific to each fullerene. The intensity and parameters of fluorescence depend on both the fullerene and solvent and provide the conditions for the quantification of both fullerenes in their mixtures without separation. The detection limits for C[sub.60] in n-hexane and C[sub.70] in benzene under the selected conditions are 7 and 2 nmol/L, respectively. The approach was tested for model and real mixtures of fullerenes C[sub.60] and C[sub.70] .