Pesticide residue rapid tester solves the problem of rapid determination of pesticide residues

One third of the daily food intake is vegetables. In the tide of the market economy, a few vegetable farmers in some areas are blindly pursuing economic benefits. Regardless of the governmentâ€™s three-and-five applications, the use of highly toxic pesticides on vegetables causes food poisoning due to consumption of vegetables. Upward trend. This issue has attracted the attention of governments at all levels and has adopted a series of corresponding management measures to curb the development of this trend.

China's research on pesticide residues and tests in crops and agricultural products began in the early 1960s, when capacity and colorimetric analysis were used based mostly on the chemical or structural characteristics of pesticides. Beginning in the 1970s, using thin-layer analysis, into the 1980s until now, the use of advanced instruments such as gas liquid chromatography, high performance liquid chromatography, gas chromatography coupled with mass spectrometry. The method of the 1970s and 1970s was simple and easy, but problems such as impurity interference and low sensitivity were difficult to solve. The method since the 1980s has good specificity and high sensitivity, but the analysis period is long, the equipment is expensive, and the base layer is not easy to promote.

At present, in response to the environmental pollution of pesticide residues, domestic and foreign counterparts have proposed four kinds of biological rapid test methods for how to quickly determine pesticide residues (pesticide residue rapid detector):

(1) Using bacteria capable of generating fluorescence, when the bacteria are subjected to residual pesticides in the sample, the fluorescence is weakened, and the degree of attenuation has a linear relationship with the concentration of the poison. This method can be used to determine common organophosphorus pesticides such as methamidophos.

(2) Determination of insecticides, fungicides, herbicides and their toxic pollutants in the test samples by sensitive houseflies kept in the laboratory. For example, if 10 grams of vegetables are placed in a bottle, 50 sensitive house flies are added. After 3 hours, if the housefly dies more than 5, the pesticide pollution exceeds the limit standard, and the death rate is more than 10, indicating that the pesticide pollution is very high. serious.

(3) Molecular biological methods, which utilize the principle that chemical substances can produce immune antibodies in animals, and screen antibodies into kits, through enzyme-linked immunological reactions between antibodies and antigens, and then colorimetric determination of pesticides Residual amount.

(4) Biochemical method, based on the principle of enzyme chemical reaction, developed a rapid test card for pesticides. It has been used in some parts of the country and in the province to detect residues of organophosphorus and carbamate pesticides in vegetables.

In summary, the pesticide residue detection (pesticide residue speed measuring instrument) in China's vegetable agricultural products has been developed by the agricultural, health research and other units for many years of research and development methods with high sensitivity and specificity. However, these methods have a long detection period and require high equipment and personnel quality. At present, there are more than 20 varieties of high-toxicity and high-residue pesticides that are banned on vegetables in various places. Faced with the fact that vegetables are sold in large quantities and wide in scope, there are many varieties of pesticides banned, and the detection operation is simple, fast and accurate. We must study A more practical pesticide residue detection method is adopted to prevent vegetables with high toxicity and high residual pesticide pollution from entering the sales channel.

To do this work, I hope that the government functional departments can formulate and issue relevant policies and regulations, do a good job in quality education for vegetable farmers, strengthen the awareness of safe use of vegetable farmers, and truly implement the safe production of vegetables, and organize relevant units to treat highly toxic pesticides. The focus is on the banned variety detection method for research, and the well has a major breakthrough in practicality, such as the rapid verification method of methamidophos. Secondly, the application of the rapid detection speed of pesticides (pesticide residue tester) should be further verified, and the correct use method should be mastered to better serve the rapid detection of pesticide residues.

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