Chemical Forums
Specialty Chemistry Forums => Other Sciences Question Forum => Topic started by: Gavtadze vazha on April 12, 2020, 02:42:02 PM
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Hello,
We are determining manganese concentration by potentiometric titration using a platinum wire spiral/ tungsten wire couple as electrodes in combination with sodium pyrophosphate, as described in the standard method. We are obtaining good results with this method.
Recently, we received an automatic potentiometer Titrino Plus 848, which has a combined platinum ring electrode, supposedly equipped with Ag / AgCl reference electrode element. Work on a new device shows that we are getting higher concentrations of manganese compared to the paired platinum/tungsten electrode method, in addition, we are observing irreproducible results with this machine.
I would be grateful to hear your opinion about the acceptability of using this Pt ring ORP electrode in the potentiometric titration of manganese for arbitration purposes, while the standard procedures indicate only the use of platinum-calomel, platinum-platinum or platinum-tungsten couples.
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No multiple posts here
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Sorry, I thought it was possible to ask a question in different categories
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No, because who will collect all the answers in the different Threads. All Catogeries will be viewed.
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topic locked here
other thread at
https://www.chemicalforums.com/index.php?topic=103762.0
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Failure to Read Forum Rules Before Posting is the usual reason very new members double post
Click on the link near the top center of the forum page.
Forum Rules: Read This Before Posting.
http://www.chemicalforums.com/index.php?topic=65859.0 (http://www.chemicalforums.com/index.php?topic=65859.0)