170135_inorganicventures_flipping

Managing Interferences

100 ppm Fe in 2% HCl

120000

Identifying your polyatomic interferences • Matrix variability

100000

• different acids • different conc. • Run single elements • e.g., Fe

80000

60000

40000 Intensity (cps)

20000

0

23 27 24 25 26 39 42 43 44 45 46 47 48 49 50 51 52 53 55 59 60

Mass

Strategies for “tough” Samples

Internal Standards

• Matrix matching • Instrument drift

• Standard bracketing • Calibration curve

Managing interferences • Identification • Correction equations