Calibrating PH monitor with milk?

Those darn bacteria make your inexpensive calibration solution improbable. On the other hand, different bacteria make your reef tank possible.

 

Well, I tried it. Calibrated to 6.7 in my fat free milk. Rinse with water and put back in milk to read 6.7 then rinsed and took to tank. 8.1 and fluttering with 8.2. Seems bout right.

I will go pick up a 7.0 and 10.0 set of Milwaukee calibration fluid, calibrate it then hit the milk. If it reads 6.7.... it's on, cheap, and always in my fridge.

 

Report back please.

 

Will do.

 

Well, I went and picked up both the 7.0 and 10.0 calibration fluid. Calibrated my PH monitor and tested the milk. 6.8. I then went back to the 7.0 fluid and it was 7, then to the 10.0 and it was 10. Then to my tank. 8.1.

Looks good to me! Huge come up on knowledge and a money saver! ;D

 

Isn't the calibration fluid re-usable? Is it real expensive to buy? I want a pH probe but haven't bought one yet. We do have calibration fluid at work though so i could just do my probe there. Where did you pick up this affordable pen style one?

 

Just picked it up at a LFS. I don't think it is re-usable. They are 2.50 each at my LFS but cheaper online.

 

Cool!!!

 

Yes, use it up!

 

yea, but even though you had the 6.7 reading and it calibrated correctly this time, that doesnt mean necessarily that it will remain at that same PH as it ages i teh fridge. your previous post stated that as it aged or soured, its PH dropped significantly to 4.4. that right there would lend me to believe that it is NOT a good measure to calibrate a PH meter to. especially since milk does contain milk contains some form of h2o (Milk is an emulsion or colloid of butterfat globules within a water-based fluid) in it, wouldnt it also increase PH possibly as it is exposed to oxygen like our tanks water is capable of doing?



wiki states it is 6.4 to 6.8 Milk - Wikipedia, the free encyclopedia The reduced pH from lactic acid accumulation denatures proteins and causes the milk to undergo a variety of different transformations in appearance and texture, ranging from an aggregate to smooth consistency.

Very interesting though. hydrogen peroxide has a PH of 6.2


UGH my brain hurts now.