ICP-MS 7900, mercury dilution false concentration

Hello Everyone
I have an issue with ICP-MS 7900 on mercury analysis. If we run 1:1 dilution after digestion the results are OK but when we need to analyze the further dilutions I get high concentration of mercury and amazingly the RSDs are not high to say it's a false pulse. Does any body had a similar experience? Please let me know if you needed further information.
Thank you

Was this helpful?