Hi there. I recently started using an ICP-OES and after replacing the less concentrated reference for a new one, the values for Tin and Antimony are higher than they should be. E.g. now reading 0.0045% for a sample that have no more than 0.0005%. Why?

Hi there. I recently started using an ICP-OES and after replacing the less concentrated reference for a new one, the values for Tin and Antimony are higher than they should be. E.g. now reading 0.0045% for a sample that have no more than 0.0005%. Why?

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