Originally Posted by
dspeers
What else could it be? Remember the TDS is really an EC value which directly correlates to the # of free ions in solution. An almost immediate jump from 200 to 900 is hard to explain any other way.
Did make a misstatement earlier, indicated that an amino acid had the same effect per ion as an inorganic acid, similar value but not the same, pKa, temperature, and molecular size all play and each ion has a different EC vs concentration curve, and a different EC vs temp curve.