[subu]

Hello,
I am running electrochemical measurements (CV) on my samples. I am trying to see if anyone has suggestions on the use of an internal standard. I am not able to use ferrocene or related aromatic standards (ferrocene and cobaltocene derivatives) as they are complexing with the analytes. I cannot use aqueous solutions due to insolubility of my compounds. Can anyone suggest some internal standards in acetonitrile that I could try?

Thank you for any suggestion!