We are interested in studying K+ dynamics in cortical slices and to do so we will perform extracellular recordings with K+ sensitive electrodes. However, we have got some problems in buildind these electrodes, since the K+ ionophore I (cocktail A) does not stick to the tip after adding KCl (100mM) as back filling solution in one of the barrels.

I have read that some groups first silanize the barrel and then tip-fill with K+ ionophore and KCL. What is the protocol for silanizing K+-sensitive electrodes?

Thank you,

Alba Bellot Saez

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