I was wondering what the most effective (i.e. most accurate) methods are for determining the concentration of a known solution. In my specific case, I need to determine the concentration of a KNO3(aq) within 10% of the actual value. As of now, I have written up two separate procedures to determine the concentration of the solution. The first one utilizes the direct proportionality of solution concentration and conductivity. The other is a titration with the KNO3(aq) being put through an ion exchange column. I don't really have any ideas on other methods (besides evaporating the solution) so I'm just asking if there are better methods for this lab.