Re: EIS of aqueous solution.

[Clóvis Fischer]

  Olá, Anderson.

    Sou da FZEA-USP, Pirassuniunga.

     Vamos conversar !   Tenho interesse em EIS !

         Clóvis

2018-02-28 18:36 GMT-03:00 Anderson Silva <b.t.ki...@gmail.com>:

Dear all, i am Anderson from Brazil and will be glad if some of you can help me on my problem.

Is it possible to measure the variation of impedance/resistance of a solution (ultrapure water + ferrous ammonium sulfate) with increasing iron concentration with precision?

So far, I'm doing two electrodes EIS (using two platinum plates ~1cm²) , but the impedance value increases every time I perform an EIS measurement, without adding anything to the solution (The first EIS is the black curve). UV-Vis spectra confirms that there's no change in the initial iron concentration of the solution.

 

After some measurements increasing the iron concentration, I noticed that the platinum electrodes show some marks on the solution level that seems to be some adsorption, that  increases the resistance.

Is there any way to mitigate this effect or another way to measure the change in impedance/resistance of the solution without affecting the electrodes?

I really could use some insights.

Thanks in advance.

--
You received this message because you are subscribed to the Google Groups "Impedance Spectroscopy" group.
To unsubscribe from this group and stop receiving emails from it, send an email to impedance-spectroscopy+unsub...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

[Clóvis Fischer]

  Penso que seria bom procurar algum prof. da área de eletroquímica !

    Tenho algumas sugestões !

            Clóvis

To unsubscribe from this group and stop receiving emails from it, send an email to impedance-spectroscopy+unsubscri...@googlegroups.com.

[Anderson Silva]

Oi Clóvis,

Fico feliz que tenha entrado em contato.
Aceito as sugestões que tiver com muito agrado!
Vamos conversar

[Umair Hussain Shah]

Please explain in English as I am following it. Thanks 

--
You received this message because you are subscribed to the Google Groups "Impedance Spectroscopy" group.

To unsubscribe from this group and stop receiving emails from it, send an email to impedance-spectro...@googlegroups.com.

[Anderson Silva]

Hi Umair,
Clovis just told me he's also from Brazil and that he also have interest in this subject.

I still wait for suggestions/solutions, although.

[Clóvis Fischer]

  Então !

     Está onde ?

--
You received this message because you are subscribed to the Google Groups "Impedance Spectroscopy" group.

To unsubscribe from this group and stop receiving emails from it, send an email to impedance-spectroscopy+unsub...@googlegroups.com.