Calculation for dilution of PH sample on Hanna test.

[HuduVudu]

Trying to test for pH and it is higher than the range of the Hanna test (8.6).

Diluted sample by half with RO (assuming 7.0) and got 8.4.

What is the math for calculating the actual pH?

 

[Malcontent]

Can't really be done...

Hanna ph checker how to dilute a sample

Hello. I have been getting a high warning on the ph checker. Its says to dilute the sample and retest but how do you dilute a new sample.? Thanks

www.reef2reef.com

 

[Randy Holmes-Farley Verified Community Expert]

pH will rise on dilution of seawater with fresh. Not intuitive, but its a known effect for known reasons.

I also think pH 8.6 is unlikely to be accurate.

 

[HuduVudu]

pH will rise on dilution of seawater with fresh. Not intuitive, but its a known effect for known reasons.

I also think pH 8.6 is unlikely to be accurate.

I am using it in a non-standard seawater sample, I have added things that raise the pH and I want to see where it is at. Sadly I got rid of my Salifert pH kit.

 

[Randy Holmes-Farley Verified Community Expert]

I discuss it in detail here:

Master Reef Chemist Certification Question!!! (yes, you want this title)

Randy, wish I knew! I live at St Louis and teach at the rival! [emoji106]. Happy Reefing [emoji3]

www.reef2reef.com

 

[Randy Holmes-Farley Verified Community Expert]

I am using it in a non-standard seawater sample, I have added things that raise the pH and I want to see where it is at. Sadly I got rid of my Salifert pH kit.

Ah, the only good answer is a meter that can read higher.

 

[HuduVudu]

Ah, the only good answer is a meter that can read higher.

Sadly.