Today I got to run all of my samples! First I ran 10 samples of 20x buffer solution twice to get smaller standard error. The error was reduced from about 0.14 to 0.04. I also ran a sixth run of the 20x samples for varied sodium by combining the left over solution from the other 4 runs. Unfortunately, this run measured sodium much lower than the other runs so I am not sure if we should include this data or not.