Sciencemadness Discussion Board
Not logged in [Login ]
Go To Bottom

Printable Version  
Author: Subject: Digital pH meter
ELRIC
Hazard to Others
***




Posts: 244
Registered: 23-2-2015
Location: Kentucky
Member Is Offline

Mood: No Mood

[*] posted on 25-3-2021 at 17:08
Digital pH meter


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.
View user's profile View All Posts By User
RustyShackleford
Hazard to Others
***




Posts: 200
Registered: 10-12-2020
Location: Northern Europe
Member Is Offline


[*] posted on 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]
View user's profile View All Posts By User
Corrosive Joeseph
National Hazard
****




Posts: 915
Registered: 17-5-2015
Location: The Other Place
Member Is Offline

Mood: Cyclic

[*] posted on 25-3-2021 at 18:10


Quote: Originally posted by RustyShackleford  

It should be stored in 4M KCl solution.
]


I have often pondered if NaCl solution is an acceptable replacement.



/CJ




Being well adjusted to a sick society is no measure of one's mental health
View user's profile View All Posts By User
ELRIC
Hazard to Others
***




Posts: 244
Registered: 23-2-2015
Location: Kentucky
Member Is Offline

Mood: No Mood

[*] posted on 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.......
View user's profile View All Posts By User
RustyShackleford
Hazard to Others
***




Posts: 200
Registered: 10-12-2020
Location: Northern Europe
Member Is Offline


[*] posted on 26-3-2021 at 03:25


Quote: Originally posted by Corrosive Joeseph  
Quote: Originally posted by RustyShackleford  

It should be stored in 4M KCl solution.
]


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]
View user's profile View All Posts By User
RustyShackleford
Hazard to Others
***




Posts: 200
Registered: 10-12-2020
Location: Northern Europe
Member Is Offline


[*] posted on 26-3-2021 at 03:29


Quote: Originally posted by ELRIC  
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.
View user's profile View All Posts By User

  Go To Top