I purchased a digital pH meter a few months ago and finally used it today for someone else. The someone else is an ex-environmental analysis tech. She
wanted me to test several different beverages after a trip to the dentist. Upon completion I was told that I need to store the probe in distilled
water and that it should never become dry after use. I have never heard of this. Can anyone confirm/deny? Thanks in advance. RustyShackleford - 25-3-2021 at 17:13
DO NOT keep a pH brobe in distilled water. It will get ruined!
It should be stored in 4M KCl solution.
Also it should never be left dry
[Edited on 26-3-2021 by RustyShackleford]Corrosive Joeseph - 25-3-2021 at 18:10
I have often pondered if NaCl solution is an acceptable replacement.
/CJELRIC - 26-3-2021 at 03:22
Thanks for the confirmation guys. I had some KCl, or at least what I thought was KCl. Turns out I got ripped off. I believe it to be K₂SO₄ instead
based off of solubility and an SDS. Funny thing about labels. Looks like a quick trip to town is in order. I could just take one for the team and try
the sodium salt like CJ mentioned.......RustyShackleford - 26-3-2021 at 03:25
I have often pondered if NaCl solution is an acceptable replacement.
/CJ
No! the brobes themselves are filled with KCl solution or a jelly of it. storing it in a NaCl solution would do nothing to prevent the KCl inside from
migrating out, thus ruining the probe.
[Edited on 26-3-2021 by RustyShackleford]RustyShackleford - 26-3-2021 at 03:29
Thanks for the confirmation guys. I had some KCl, or at least what I thought was KCl. Turns out I got ripped off. I believe it to be K₂SO₄ instead
based off of solubility and an SDS. Funny thing about labels. Looks like a quick trip to town is in order. I could just take one for the team and try
the sodium salt like CJ mentioned.......
ppt the sulfate with stoiciometric CaCl2. Should be good enough to work as storage fluid.
