Glass pH meter electrode

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Mari Williams 1K
Posts: 104
Joined: Wed Sep 30, 2020 9:53 pm

Glass pH meter electrode

Postby Mari Williams 1K » Sun Mar 07, 2021 12:53 pm

Why is a pH meter electrode specified as glass? What does that material do for measuring the pH?
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Joseph Hsing 2C
Posts: 99
Joined: Wed Sep 30, 2020 9:42 pm

Re: Glass pH meter electrode

Postby Joseph Hsing 2C » Sun Mar 07, 2021 2:10 pm

I believe glass is used for pH electrodes because the thin glass membrane allowed for selective movement of H+ ions across.
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kaitlyn nguyen 2F
Posts: 34
Joined: Mon Jan 09, 2023 9:08 am

Re: Glass pH meter electrode

Postby kaitlyn nguyen 2F » Sat Mar 18, 2023 4:49 pm

I believe there are also several advantages to using glass specifically for measuring pH. It is very sensitive and also effective to clean and calibrate with buffer solution. The external surface of the electrode also has a hydrated gel glass layer and allows partial penetration of H+ ions.
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