Basic Training 4th Annual ICP Conference

Summary of Using 3 Methods

20 ppb Mn Manganese Present in the Fe Pieces Sample (30ppb) 25 30 35

15

40

OES Cal-Curve ICP-MS OES Std Addns

0 ppb Mn Manganese Present in the Fe Powder Sample (7ppb) 5 10 15

OES Cal-Curve ICP-MS OES Std Addns

Uncorrected calibration curve expected to be low due to signal quenching in sample. ICP-MS expected to be high due to known mass bias from the Fe. OES standard additions expected to be accurate due to matrix matching to the standard.

Is this Zn, or is it Fe?

• It’s Fe! The Zn 206.200nm line is not properly centered. • There is actually no Zn present in this sample.

Zn 206.200nm? Or is this an Fe interference?