Question

The presence of Al3+ in a water sample can cause erroneous results during an EDTA titration because it is also effectively chelated by the titrant in addition to any Ca2+ and Mg2+ in the sample. Describe how the effect of this ion can be mitigated by addition of a new species into the water sample. What is the general term for the process of adding a secondary species to an analyte solution in order to prevent chemical interference during a targeted analysis?

Answer 1