FIG. 3 shows a basic sketch of a multicollector in accordance with an embodiment of the invention.
FIG. 4 demonstrates a mass spectrum of a test solution containing Ti, Cu, Ba and Sc with the quadrupole mass filter set to full transmission (ion guide mode) and no gas in the collision cell.
FIG. 5 corresponds to FIG. 4 but shows a collision cell flooded with He gas for collisional focusing.
FIG. 6 shows a mass shifted TiO+ and ScO+ mass spectrum with Cu+ background and Ba++ contamination.
FIG. 7 shows the same region of the spectrum as FIG. 6, but with the quadrupole mass filter set to only transmit 48Ti+±8 amu.
FIG. 8 shows a mass spectrum of Test solution containing 2 ppm of Ca, Ti, V and Cr, with the quadrupole mass filter set to full transmission (ion guide mode), and no gas in the collision cell, the spectrum being measured at an axial detector of the multicollector.
FIG. 9 shows a mass spectrum of Test solution containing 2 ppm of Ca, Ti, V and Cr, with collisional focusing by He and oxygen mass shift with O2 addition to the collision cell wherein a quadrupole mass filter is set to mass window mode 48Ti+±8 amu.
DESCRIPTION OF VARIOUS EMBODIMENTS
