Quantitative determination of <tex>C_{60}$</tex> and <tex>C_{70}$</tex> in soot extracts by high performance liquid chromatography and mass spectrometric characterization

A quantitative HPLC method was applied to determine the amounts of C-60 and C-70 present in extracts of soot produced in the electric arc reactor and in flames. The combustion method was found to yield a higher C-70/C-60 ratio (0.67) compared with the evaporation experiment where the C-70/C-60 ratio amounts to 0.27.