170135_inorganicventures_flipping

Mass Resolution

90% of all ICP-MS

• Resolution (R) • R = m /Δ m

• m = mass being measured • Δ m = mass difference between two resolved peaks

• Quadrupole typical R = ~400-600 • Magnetic Sector R > 10,000

Thomas, 2001

Mass Resolution

High resolution has a price …

Transmission efficiency decreases as function of resolution

• Necessary resolution

• ArO and 56 Fe: R = 2500

• Resulting signal intensity • ArO and 56 Fe: ~20%

Thomas, 2001