Interface with water and electrodes
- From: "Leon" <flemmingg@xxxxxxxxxxxxxx>
- Date: 8 Aug 2005 05:26:03 -0700
Hi
I'm sitting here trying to solve an interface problem.
The aim is to measure the impedance between to electrodes in a
homogenous electric field created by two excitation electrodes (4 cm
apart). The field is created using 100 uA and 5 KHz. The impedance is
then measured between the excitation electrodes by two other electrodes
placed very close together (2 mm).
The surrounding is made up by saline (0,9% NaCl).
I have experienced big fluctuations in the measuring result depending
on the electrode materials. Best results have been achieved with tin
coated copper which has been found empiric. The problem is that these
are too big in diameter (0.4mm) and difficult to mount.
Is it possible to electro-tinning a stripped thin wire or does some one
has another solution (type of wire which has a good interface with
water)?
Perhaps someone has seen a book dealing with this issue?
Thanks in advance
/Flemming
.
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