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Pt electrode Eh measurement

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Ruslan_Nur:
I measure Eh in aqueuos systems using
standart Pt electrode.
I know, that this measurement not always
give native potential for this systems.
Help me please to find any information about this question, especially for couples O2/O[2-].
S[2-]/SO4[2-].

Donaldson Tan:
Honestly, I can't make out what you are saying

Ruslan_Nur:
If i have in aqueous solution O2 and SO4 how can i
stabilyse this system to get Eh with good repeatability?

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