Pesticide residues in traditional Chinese medicine.

There are three main sources of pesticide residues in traditional Chinese medicine:
1. Direct pollution caused by the abuse of pesticides during the planting process of Chinese medicinal materials: Growers of Chinese medicinal materials lack basic plant protection knowledge, choose pesticides that are efficient and low-cost, and even use some banned pesticides. In order to ensure production and increase income, growers apply pesticides frequently, and often use a mixture of several highly toxic pesticides. Especially during severe periods of pest infestation, the concentration of pesticides used doubled, causing pesticide residues in Chinese medicinal materials to exceed standards.

2. Indirect contamination of Chinese medicinal materials by pesticide residues in soil, air, and irrigation water: During the cultivation and production process of Chinese medicinal materials, Chinese medicinal materials passively absorb and accumulate pesticides from pesticide-contaminated environments, such as soil, water sources, and the atmosphere.

3. Pollution caused by Chinese medicinal materials during the harvesting, processing, storage, and transportation processes: The timing and season of pesticide application are unreasonable. For example, in some Chinese medicinal material producing areas, harvesting begins soon after pesticide application. In the production process of traditional Chinese medicine, there are many links and the possibility of contamination is high, such as contamination of auxiliary materials and drying places during the processing of medicinal materials. In addition, in the packaging and transportation of traditional Chinese medicine, if the materials used to package pesticides and fertilizers are used to package medicinal materials, and the vehicles transporting pesticides and fertilizers are transported without thorough cleaning, etc., they will cause pollution.

Distribution characteristics of pesticide residues in traditional Chinese medicines:
1. Organochlorine pesticides in traditional Chinese medicine have a higher degree of pollution than other types of pesticides. The order is: organochlorines > pyrethroids > organophosphorus and carbamates. The detection rate of organophosphorus and carbamate pesticides is low, and only medicinal materials with a long history of artificial cultivation and serious insect pests, such as Jusi, are occasionally detected;

2. The pesticide residues in cultivated medicinal materials are slightly higher, while only trace amounts are found in wild medicinal materials;

3. The pesticide residues of the same medicinal materials and different parts of the same medicinal materials in the same area also have large differences; roots and rhizome medicinal materials are generally more likely to be contaminated by pesticides than other types of medicinal materials;

4. There are relatively few pesticide residues in Chinese patent medicines and extracts, and the residue levels are also relatively low.

Prosecution and control of pesticide residues in traditional Chinese medicines:
Aoda Instruments' rapid pesticide residue tester can accurately and quickly detect organophosphorus and carbamate pesticide residues in vegetables, fruits, grains, tea and soil. It can be widely used in vegetable testing centers at all levels, farmers’ markets, supermarkets, environmental protection agencies, vegetable planting bases, restaurants, vehicles and laboratories and other food safety testing and monitoring places to detect pesticide residues in fruits and vegetables.

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