Monday, December 27, 2010
Calibrating my pH meter
I could have ordered it from an aquarium supply place or my new favourite shop, Pro-Lab in Quebec (check out the beakers and test tubes!), but I didn't want to wait to play and I wanted to shop local. So I went to one of the many hydroponic growing stores in Chilliwack - thank goodness I live in the grow op belt of B.C.! - and bought myself a container of pH 4 and pH 7 calibration solution. (They didn't have the pH 10, so I will order that from Pro-Lab!)
If you have a pH meter, you'll need some calibration fluid. Mine calls for pH 4, pH 7, and pH 10, although I can get away without the pH 10. Check what you need. You might find it locally at aquarium or hydroponic or "indoor growing" stores.
I rinsed it with distilled water, then put it into the pH 7 solution, which was a lovely lime green, until it noted the pH and held it. Then I rinsed it again, then put it into the pH 4 solution until it noted the pH. Calibration done.
I could have done a triple calibration with pH 10 included, but I don't have that yet. I will once I've purchased some!
Calibration done! Time to get measuring!
Our caramelized onion marmalade has a pH of 3.9! I'm off to the workshop to test more stuff!
As a note, every pH meter is different so check yours to see what the manufacturer suggests. I just wanted to share in the pH meter-y happiness!