Hi all,
Recently got an ATI ICP test back and my alkalinity showed 7.08, which is .52dkh lower than what I tested my alk to be with the Hanna checker on that same day. Margin of error on the Hanna is +-.3 and this .52 difference is outside of that range which worries me a bit.
What is the best way to verify accuracy of Hanna alkalinity checkers? There’s no way to calibrate them so do I have to accept that my real alk is likely lower than what my Hanna checker says forever? I’d likely want to keep my alk above 8.0 in this case to provide more of a buffer.
I tested with salifert which is a bit harder to get a reading down to .1, and it is somewhere in-between 7.1 and 7.6, it’s more like 7.3 to 7.4 which lines up fine with the Hanna checker specified accuracy.
I wouldn’t even be opening this can of worms if the ICP came back within .3 of the Hanna, but there may possibly be an issue with my checker. The reagent was a week old, and was kept in the fridge. I have never had discrepancies between reagent bottles this way.
Curious to hear thoughts, although I may be over-reacting here lol
Recently got an ATI ICP test back and my alkalinity showed 7.08, which is .52dkh lower than what I tested my alk to be with the Hanna checker on that same day. Margin of error on the Hanna is +-.3 and this .52 difference is outside of that range which worries me a bit.
What is the best way to verify accuracy of Hanna alkalinity checkers? There’s no way to calibrate them so do I have to accept that my real alk is likely lower than what my Hanna checker says forever? I’d likely want to keep my alk above 8.0 in this case to provide more of a buffer.
I tested with salifert which is a bit harder to get a reading down to .1, and it is somewhere in-between 7.1 and 7.6, it’s more like 7.3 to 7.4 which lines up fine with the Hanna checker specified accuracy.
I wouldn’t even be opening this can of worms if the ICP came back within .3 of the Hanna, but there may possibly be an issue with my checker. The reagent was a week old, and was kept in the fridge. I have never had discrepancies between reagent bottles this way.
Curious to hear thoughts, although I may be over-reacting here lol