Melamine in Milk Colloidal Gold Rapid Detection Card is a rapid screening tool specially designed for dairy product safety detection. It is mainly used for quantitative or qualitative detection of melamine residues in milk. Melamine, as a chemical raw material, has become a "invisible killer" in the field of food safety due to its addition to dairy products by criminals to improve protein detection value. Therefore, rapid and accurate detection of its content is essential to ensure the safety of dairy products.

From the detection principle, this detection card is based on colloidal gold immunochromatography technology. Colloidal gold is a commonly used nano-marker with high adsorption and color-developing properties. The test card contains antibodies specific to melamine. When a milk sample is dropped into the test card, if the sample contains melamine, it will bind to the antibody labeled with colloidal gold to form a complex. These complexes move on the test strip with the liquid and react with the fixed melamine-carrier protein binding when they reach the test line, forming a red line (positive result); if there is no melamine in the sample, the test line will not show color (negative result). At the same time, the quality control line will always show color to ensure that the detection process is effective.

In the application scenario, the detection card is widely used in milk production enterprises for raw material acceptance, processing process monitoring, and can also be used for rapid sampling inspection by market supervision departments, as well as self-screening by consumers before purchase. Compared with traditional high-performance liquid chromatography and other detection methods, its advantage is "fast, simple and sensitive". Under normal circumstances, the detection process only takes 10-15 minutes, and the operator does not need professional training. He only needs to add samples dropwise according to the instructions and observe the results. The detection limit can reach the ppb level (parts per billion concentration), which can effectively identify trace residues. And the cost is low, making it suitable for large-scale promotion and use.

With the increase of dairy product safety supervision and consumers' attention to food safety, the melamine colloidal gold rapid detection card in milk has become an important technical means to protect the "safety on the tip of the tongue" by virtue of its efficient and convenient characteristics.