Figure .3. The electron-impact ionization mass spectrum of toluene soluble fullerene sample extracted from the iridium rich layer of the sample-964. The X-axis is mass (m/z) in atomic mass unit and y-axis is intensity in arbitrary unit. The peaks at 720 atomic mass unit indicate the presence of C60 in the Anjar KPB samples. The fullerene amount is estimated by using a standard C60 and found to be about 800 ppb (parts per billion). Please note that we did not observe any Helium in our samples.