Interesting info on ph calibration solution

[smoothdog]

Was looking for some pinpoint ph calibration solution on amazon and the smallest amount of individual packets I could find was a 20 pack (10 7.0 and 10 10.0). So I asked what the shelf life of the packets was since that amount would last me at least a couple of years. The basic answer was the packets last nearly indefinitely, with a link to this video testing packets over 25 yrs old. https://youtu.be/ssUCtxBRT40

 

[TanksDad13]

Nice.


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[clevername]

amazon link?

 

[Nanook]

I have a decent stash! Thanks Dog

 

[smoothdog]

amazon link?

https://www.amazon.com/gp/product/B07D9Y55GB/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

 

[achillestang2002]

I would agree that packaged calibration solution has a significantly longer shelf life than bottled solution. Hopefully no one has anything out there 25 years old but if you do enjoy. I disagree with the two point calibration being the most accurate as a three point calibration using 4.0, 7.0 and 10.0 is most accurate. However, saltwater is typically higher than 7 so it is important that you at least calibrate between 7.0 and 10.0. You definitely want to calibrate your pH meter at a point above and below the expected value to assure accuracy.

Just my $0.02 after being gone for YEARS