Hanna Alk Correction Factor

[FarmerTy]

Just curious how many people find the need to correct their alk values.

Just a brief Google search has led me to possibly using a correction factor of multiplying by 0.82 since the Hanna meter supposedly reads a bit high.

I have ordered the Hanna Alk reference and will doublecheck my results once it comes in but just wanted to see if others are correcting the value.

 

[ritter6788]

The Hanna doesn't read high for me compared to some other frequently used tests.

Sample test I did a while back,

Hanna checker 6.55
Salifert 7.3
API 7

 

[Randy Holmes-Farley Verified Community Expert]

I'm not sure how folks would determine that, or why Hannah wouldn't have the best fit they could derive based on standards. It sort of assumes one manufacturer is right and another is wrong.

That said, getting you own standard acid (say, 0.1 N HCl) and doing the titration yourself is the best way to know. That's part of my DIY alk test that I'll publish around Jan 1.

 

[saltyhog]

When I checked the standard that comes with the Salifert kit the Hanna was closer to the standard than the Salifert test was.

 

[Randy Holmes-Farley Verified Community Expert]

When I checked the standard that comes with the Salifert kit the Hanna was closer to the standard than the Salifert test was.

:lol:

Not what Salifert wants it used for.

 

[saltyhog]

:lol:

Not what Salifert wants it used for.

LOL! In all fairness the were both pretty close. The standard was 6.7 and if I remember correctly the Hanna was 6.9 and the Salifert 6.2. arty:

 

[drernesto Verified Sponsor]

So should I buy the Hanna Alk? I was planing to order it from France as I live in Lebanon...
Thanks!

 

[Diesel]

That said, getting you own standard acid (say, 0.1 N HCl) and doing the titration yourself is the best way to know. That's part of my DIY alk test that I'll publish around Jan 1.

That would be awesome Randy, looking forward to that.