Chemical Stability and Compatibility - ICP multi-element solution incompatibilities
We're having some difficulty with our ICP-OES getting a full list of elements to pass at 1 mg/L for our criteria of ± 10% recovery. When we prepare our lab mix at 1 ppm using a stock standard of 23 elements (Ag, Al As, Ba, Be, Ca, Cd, Co, Cr, Cu, Fe, K, Mg, Mn, Mo, Na, Ni, Pb, Sb, Se, Tl, V, and Zn), the addition of other elements such as P, S, Si, Sn, Li, and Ti yields inaccurate results. Any thoughts on what is happening?
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admin
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When you add the P, S, Si, Sn, Li, and Ti, there is a lot of chemistry that may take place. The list is as follows:
We have designed solutions and identified spectral lines that will give accurate readings for all of the elements in the periodic table. The only potential problem could be that the instrument you're using may not have the spectral range or sensitivity. |