170135_inorganicventures_flipping

15.11 ICP-OES Measurement

Concerns with measurement: Spectral interferences Have you ever wondered how you can get negative numbers? It is likely due to a spectral situation similar to the one shown below. A nearby Fe line interferes with the background correction upon the Al 396.152 nm line.

15.12 ICP-OES Measurement

Concerns with measurement: Matrix effects

• Matrix effects are arguably the most subtle danger to the ICP-OES analyst. Slight differences in the matrix can cause a considerable systema>c error having a definite bias. • Internal standardiza>on has been the most common approach toward correc>ng this problem and this approach does work well in many cases. • The choice of the internal standard is cri>cal.