Tutorials Nitrate-API colorimetric assay Colorimetric assay for measuring nitrate levels using API test kit. Range: 0-50ppm
Tutorials Ammonia-API colorimetric assay Colorimetric assay for measuring ammonia levels using API test kit. Range: 0-8ppm
Tutorials Nitrite-API colorimetric assay Colorimetric assay for measuring nitrite levels using API test kit. Range: 0-2ppm
Tutorials Measuring blue food dye in sports drinks Goal: Use the Open Colorimeter to experimentally calculate the molar extinction coefficient of FD&C Blue #1 Beer’s Law states that absorbance of a sample (Abs) depends on the molar concentration (c), light path length in centimeters (l), and molar extinction coefficient (ε) for the dissolved substance at the
Tutorials Making an open source COVID-19 face shield Like many people, we have been alarmed at the reports of the lack of personal protective equipment (PPE) for healthcare workers on the frontlines of the COVID-19 pandemic. We have been following the work of many individuals and groups on social media making open source PPE as we try to
Tutorials Creating a pH meter using the pH FeatherWing In this blog post we demonstrate how to create a pH meter using the pH FeatherWing, an Adafruit Feather M4 Express and a few additional components. The meter will display a continuous readout of the current pH and can be calibrated, via button press, at pH values of 4, 7
Tutorials Bismuth modified carbon paste electrode for metal measurements 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
Tutorials Making a carbon paste electrode In this blog post we describe making a DIY carbon paste electrode using graphite powder/mineral oil mix and a custom-made reusable holder.
Tutorials Square wave anodic stripping voltammetry and metal testing 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
Tutorials Making a custom electrochemical cell 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.
Tutorials Chronoamperometry with glucose test strips In this electrochemistry experiment we used the Rodeostat [https://iorodeo.com/products/potentiostat-shield] 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
Tutorials Reversible Cyclic Voltammetry In this blog post we carried out a cyclic voltammetry experiment with ruthenium hexamine Ru(NH3)6 a reversible redox couple.
Tutorials Testing a lead colorimetric assay In this blog post we describe our initial testing of a colorimetric kit for measuring lead in drinking water. In 2015, a Virginia Tech research team [http://flintwaterstudy.org/about-page/about-us/] found that over 40% of the homes in Flint, MI had elevated lead water levels with 25% of homes
Tutorials Measuring emission spectra for the blue LED transilluminator Our blue LED transilluminators [https://iorodeo.com/collections/gel-imaging] use a 470 nm LED array in combination with blue and amber acrylic filters for viewing DNA bands in agarose gels stained with DNA dyes. Images of gels stained with Greenview, GelGreen and others can be seen in previous posts on
Tutorials Irreversible Cyclic Voltammetry In this blog post we provide data from our testing of the new Rodeostat. We performed a side-by-side comparison between the Rodeostat and the Cheapstat potentiostat using ascorbate cyclic voltammetry experiments.
