Abstract: Uric acid is the final product of purine metabolism in the human body. Prolonged consumption of high-purine foods or various meats that are not fresh can lead to imbalance of uric acid in the body, resulting in high levels of uric acid in the blood and triggering a series of health problems. In this experiment, a novel Cd₂In₂S₅ nanocrystal was prepared and combined with a screen-printed carbon flexible electrode for uric acid detection. Monitoring uric acid content can be used to assess human health and determine the freshness of meat. This experiment innovatively brings nano materials to the market, enabling elementary and secondary school students, university students, and the general public to understand the principles of uric acid detection. The materials used in the experiment are inexpensive and readily available, with simple operation, enabling home uric acid testing.

Key words: onitoring human health, Uric acid detection, Popularization of science, Cd₂In₂S₅ nanocrystals, Determining meat freshness