The main reason for the unqualified agricultural products such as vegetables is that the pesticide residue exceeds the standard. Therefore, it is necessary to ensure the safety of agricultural products such as vegetables, strictly limit the circulation of unqualified agricultural products on the market, and the most important thing is to strengthen the rapid inspection of agricultural products and improve the agricultural residue of agricultural products. The frequency and range of detection. In recent years, in areas where agricultural products such as farmers' markets and supermarkets are concentrated, the rapid detection of agricultural products has been promoted through the popularization and application of rapid detection instruments for pesticide residues, which has achieved remarkable results and effectively improved the quality and safety of agricultural products in China. Cabbage, cabbage, mustard, lettuce, oiled wheat, cabbage, Shanghai green, cowpea, eggplant, etc. are the most common fruits and vegetables on the market, and these vegetables are mainly unqualified organic phosphorus and carbamate pesticide residues. This is mainly due to the spraying of pesticides in the production process. Especially in the spring, affected by humid and rainy climate, this period is the period of high pest insects breeding, so farmers will use pesticides in production and planting. In order to prevent the public from purchasing vegetables and fruits with high toxicity and high residual pesticides, it is necessary for the agricultural technology department to use pesticide rapid residue detectors to increase the detection of agricultural products. It is a safety gate for people. An important way. The rapid detection of agricultural products using rapid detection of pesticide residues has achieved remarkable results. It is not only because many agricultural technology departments use pesticide rapid residue detectors to carry out fast inspection of agricultural products, but also improve the efficiency and frequency of detection, and can be screened and discovered in time. And destroy unqualified edible agricultural products to avoid the listing of these unqualified agricultural products. More importantly, the threshold for the use of pesticide residue detectors is very low. The operation is simple and easy to use. Supermarkets, farmers' markets, and production sites can all use pesticide rapid detectors for further product safety testing. This adds more safety to agricultural product safety. Locks, thereby greatly reducing the security risks of agricultural products.
The role of the brightener is to convert the invisible ultraviolet radiation absorbed by the product into purple-blue fluorescent radiation, which complements the original yellow radiation to become white light, and improves the whiteness of the product under sunlight. Brighteners have been widely used in textiles, papermaking, washing powder, soap, rubber, plastics, pigments and paints.
Generally, brighteners are divided into two categories, one is water-soluble brighteners, and the other is water-insoluble brighteners. The former can be used as a brightener for paper, paint, washing powder and cotton fabrics. The latter can be used for whitening of chemical fibers and plastics.
It is often divided into:
This product is especially used for the molding and processing of various plastics and plastic products under high temperature. Because of its good heat resistance, light resistance and chlorine resistance, it is a brightener for polyester fibers. Polyester, cotton and other fiber blended fabrics The whitening effect is also particularly ideal, and can be used for the whitening of polyester stock solution.
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Fluorescent brightener for detergents; Fluorescent brighteners for textiles; Fluorescent brighteners for papermaking; Fluorescent brighteners for plastics and synthetic materials; Fluorescent brighteners for other purposes.