In this tutorial we use the Rodeostat potentiostat and a screen printed electrode to demonstrate current dependence on scan rate. We know that for freely-diffusible analytes like ascorbate, the anodic peak current depends linearly on the square root of the scan rate. This is described by the Randles-Sevcik equation. The
In the experiments described in this blog post, we made a bismuth modified carbon paste electrode for detecting heavy metals, lead and zinc, using square wave anodic stripping voltammetry and the Rodeostat potentiostat. This is a continuation of our experiments using electrochemistry to measure lead and other heavy metal pollutants
In this blog post we describe making a DIY carbon paste electrode using graphite powder/mineral oil mix and a custom-made reusable holder.
The Rodeostat python library has several electrochemistry programs currently implemented including cyclic voltammetry [https://blog.iorodeo.com/cyclic-voltammetry-with-the-rodeostat/], constant voltage, linear sweep, chronoamperometry [https://blog.iorodeo.com/chronoamperometry-with-glucose-test-strips/] and more. We have recently added a square wave anodic stripping voltammetry (SWASV) program to the library. Stripping voltammetry is a powerful
In this blog post we describe making a simple custom electrode mount that we used in cyclic voltammetry experiments with the Rodeostat potentiostat. The electrodes we used were purchased from CH Instruments but the custom mount could be easily modified for use with other electrodes.
In this electrochemistry experiment we used the Rodeostat potentiostat to measure glucose in liquids using commonly available glucose test strips. Glucose test strips are a type of biosensor - they convert biochemical reactions to an electrochemical signal. Each glucose test strip contains the enzyme glucose oxidase (GOx) and an electron
In this blog post we carried out a cyclic voltammetry experiment with ruthenium hexamine Ru(NH3)6 a reversible redox couple.