Shown here are some examples of quantitative detections performed with electrochemistry. The most successful commercial electrochemical application is the glucose measurement in blood. Glucose and sucrose can also be measured in potatoes, as done by SunChemical in the top picture. The LactoReader by DirectSens (picture in the middle) measures the amount of lactose in milk. Arsenic in drinking water can be measured with the AquAffirm™. Other electrochemically-detectable analytes in water are nitrate, heavy metals, and pesticides. Researchers can also measure different corrosion rates, or how fast a material is corroding. Immunosensors allow the detection of viruses, bacteria, and other elements triggering a reaction of the immune system; CoVid-19 is just one example of that. There are many possible applications due to the broad spectrum of available techniques, electrode materials, electrode modifications, and setups.