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Actually I am anal-retentive [my typo above should have read "Maybe I am just anal-retentive"/apologies if my fat fingers made it seem that I was referring to someone other than myself] (And a bit proud of being anal-retebtive :biggrin: ) And a biochemical engineer. [While the thought of titrating reagents with air in the pipette makes me shudder a bit, to each their own.]

I do agree that the actual value matters not so much (within the 8-11 range). Doing the test similarly each time is what really matters to document Alk stability - bubble or not, pink tip or not as long as it is done the same way test-to-test.

 

I was a big fan of the Hanna Alk at first (have had it for 2 years). After ~ 1 year and always being very careful with the vials (rinsing with RODI water after each use, etc) I started getting a random value here and there which was 0.5-1.0 higher than it should have been - confirmed by 2 subsequent Hanna checks verified against Salifert. Plus I hate cutting the little packets and trying not to lose any reagent. Salifert, for me, is quick and almost never needs to be repeated for a suspicious result. I do love Hanna for PO4 though.

 

$0.02

 

 

 

I figured you mean't me, which my wife say's I am, so it has to be true.tongue.gif

 

 

 

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