Chili peppers are a popular food ingredient throughout the world. Thanks to capsaicin, chili not only has
A team of scientists has created a portable device inthe shape of a small chili. It can be connected to a smartphone to display the analysis results. The paper-based electrochemical sensor in the device consists of graphene nanoplates doped with nitrogen atoms to improve their electrical conductivity.
A chili-shaped device containing a paper-based electrochemical sensor. It can be connected to a smartphone to determine how much capsaicin is in hot peppers.
Based on materials ACS Applied Nano Materials 2020, Doi: 10.1021 / acsanm.0c02079
The researchers decided to test the device. They added a drop of diluted capsaicin to the sensor, the compound underwent oxidation and reduction reactions, resulting in an electrical current that was detected by the device. After optimizing the sensor, the scientists used it to determine the concentration of capsaicin in six dried chili peppers. They added chili to a solution containing ethanol, shaken it, and then injected a drop of the sample. The device accurately measured the capsaicin concentration from 7.5 to 90 μM in six samples.
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