Chlorothalonil Colloidal Gold Rapid Detection Card is a rapid screening tool specially designed for the detection of pesticide residues in food. Its core principle is based on colloidal gold immunochromatography technology. Colloidal gold, as a commonly used immune marker, has high sensitivity and color development stability. It can specifically bind with specific antibodies to form a complex. Rapid identification of the target is achieved through the antigen-antibody reaction on the test strip.

In practical applications, this detection card is mainly used for qualitative or semi-quantitative detection of chlorothalonil residues in food. Chlorothalonil is a widely used broad-spectrum fungicide, which is often used in pest control of vegetables, fruits, grains and other crops, but excess residues may cause latent risks to human health. Therefore, rapid and accurate detection of its content in food is essential to ensure food safety.

When used, simply drop the sample (such as fruit and vegetable extract) into the test card and sample hole. The chlorothalonil in the sample will combine with the colloidal gold-labeled antibody to form a complex, and then move to the other end of the test strip under chromatography. When the complex passes through the detection line, it will specifically react with the chlorothalonil antigen fixed on the detection line to form a color-developing band; the quality control line is used to determine whether the detection process is normal. If the detection line is colored, it means that the chlorothalonil residue in the sample exceeds the threshold, otherwise it is not detected.

Compared with traditional detection methods, the chlorothalonil colloid gold rapid detection card has significant advantages: first, the detection speed is fast, usually 3-10 minutes to produce results, without the need for complex equipment and professional operation; second, the operation is simple, only simple sample pre-processing and sampling steps, ordinary personnel can master after short-term training; third, the cost is low, the cost of a single detection is controllable, suitable for large-scale rapid screening; fourth, the sensitivity is high, can accurately identify low concentrations of chlorothalonil residue, to avoid missed detection.

At present, the test card has been widely used in food production enterprises of raw material acceptance, market supervision departments of rapid sampling, agricultural research institutions of experimental analysis and other scenarios, providing efficient and convenient technical support for food safety supervision, help to detect and control the risk of chlorothalonil exceeding the standard in time, from the source to ensure consumer food safety.