170135_inorganicventures_flipping

Relative Sensitivity

Ionization Energy

250 000

6.1 eV

Sensitivity (cps/ppb) • Mass bias

200 000

7.4 eV

8.9 eV

150 000

• Isotopic abundance • Ionization energy Tip: add carbon

100 000

10.4 eV

10 ppb Intensity (cps)

50000

0

194-Pt

202-Hg

203-Tl

206-Pb

Mass (isotope)

Limits of ICP-MS

• Resolution / Transmission efficiency • Worst case scenario: • Lowmass (sensitivity and interferences) • Low abundance • High ionization energy • e.g.: P and S! • ICP characteristics • Atmospheric pressure + Ar plasma • Liquid samples • Sample introduction system