Talk:Glass electrode
 | This article is rated C-class on Wikipedia's content assessment scale. It is of interest to the following WikiProjects: | ||||||||||||||||||||
| |||||||||||||||||||||
pMe electrode
editThe phrase pMe is not included anywhere else in the article but for that one mention, or explained. Googling pMe electrode brings up nothing related to chemistry.
The reason for preventing the glass membrane from drying out should be provided.
Comment of Devoldev (talk) 10:35, 20 April 2009 (UTC)
In my opinion there is an error in the description and the figure of the glass electrode; the inner solution contains also HCl solution and so the item 3 of the description is incomplete and the graphic correspondence is wrong; secondly the external ref electrode is not correctly described; it contains KCl at a certain conc; the description you give is inconsistent and not coherent with electrochemistry principle; a good correct description scheme is given as an example in an italian book Bianchi e Mussini - Elettrochimica - Tamburini Masson 1976 at pp. 222 eq. 207;
sorry but I have not understood as to interact with the other contributors
Devoldev (talk) 10:35, 20 April 2009 (UTC)
Missing items in the glass electrode article
editI was looking for some information on the history of the glass electrode. I didn't see any in the article but found some by following the Nicolsky link.
Information on the composition, thickness and preparation of the glass membrane could also be interestning. —Preceding unsigned comment added by 90.239.66.144 (talk) 12:57, 13 February 2010 (UTC)
Concentrated acid solutions use
editWhat are the special calibration procedures required for such an electrode to be used in concentrated acid solutions above 2-3 M in hydrochloric or nitric acid?--5.2.200.163 (talk) 16:24, 5 July 2018 (UTC)
I would say this is not something that Wikipedia would cover?Toby Broom (talk) 19:10, 21 October 2020 (UTC)
Change from 0.1 M HCl
editAll my textbooks say that the glass electrode contains 0.1 M (or 0.1 N if older) HCl, as this article did. It was changed to 1 x 10^(-7) M (i.e. pH 7) in 2010 without proper explanation or reference. If manufacturers really have changed, then we need a proper citation and explanation. Clearly the potential will be different. Many web pages and some publications have clearly sourced this Wikipedia article, so cannot be considered reliable references. A genuine one would be welcome. (Do not confuse this with the filling of the reference electrode). Chemical Engineer (talk) 12:58, 13 July 2018 (UTC)
- I would add that all references are ancient and mainly concerned with history. The key information (for an encyclopedia) about what a glass electrode is and how it works is not cited.Chemical Engineer (talk) 13:05, 13 July 2018 (UTC)
- Isn't it 0.1 M KCl? This article speaks of an additional 10^-7 HCl to make pH neutral. However this concentration would have a very poor buffer capacity and may be offset by reactions with the inner glass surface. 0.1 M HCl seems like a better choice keeping hydrogen ion as well as chloride ion concentration more or less constant i.e. buffering these two important concentrations. One alternative could be to use some (other) buffering solution, but chloride buffering would still be needed. Using 0.1 M HCl instead of neutral pH will produce a voltage offset but this is easily compensated for and stability is more important. As I remember the reference electrode of the combination sensor I have used had contact with the atmosphere through a vent hole and was filled with saturated KCl in order to keep the chloride concentration constant. This would also cause some offset which was compensated for in the two buffer calibration used. 150.227.15.253 (talk) 10:35, 22 June 2022 (UTC)
Acid Error and Alkali Error
editThis paper[1] contradicts the evidence published on Wiki article. Here is a review paper [2] Another [3]