Hi,
I am working on electrochemical sensing of metals using Square Wave Stripping voltammetry, I am getting good results ( prominent peaks of analytes) but also there appears peak between 2-4 mV vs. SCE when there is no analyte in system. Is there any method for base-line correction???
My WE is GCE modified with Au-NPs, RE is Calomel 3.5 M KCl, Pt as CE. I am using ultrapure water for buffer synthesis. Do clean cell and WE carefully i am very confused how to remove this error.
What should i do?
I have deposited Au-NPs on GCE by drop casting. Yes i have tried this, no such peak appeared in CV.
Is the peak present without the Au-NPs? I would bet that the peak you see is coming from some quinone groups of the carbon.
Also, you might like to check a case of creating extra nanobubbles (due to Water Splitting from a previous DC -accidental- polarization, history). In a case of such possible nanobubbles it takes long time (>>30 min) to dissolve at RT.
@ Gustav Karl Henrik Wiberg Sir, you are right. Thanks to you and all.
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