I measure temperature with a thermometer and compensate manually. Commercial buffers have tables of pH-values based on temperature printed on them, so I know what pH to expect from them.

Quote Originally Posted by Kirk Keyes View Post
Also, buffers, for whatever reason, often are off a little bit from calculated values. You can made fine adjustments to them. For borate buffers, use boric acid to make it more acidic, and sodium hydroxide to raise the pH.
That's good to know. Although if I can hit +/-0.03, that should be good enough. Do you think commercial buffers are that accurate? Anyway, my problem is that my home-mixed buffer was over 0.20 off from what I calculated, so I clearly made a mistake in the theory somewhere.

Mark Overton