In the agricultural production process, the use of chemical pesticides is a common phenomenon in order to be able to effectively control pests and weeds. However, due to the lack of scientific knowledge of farmers, the correct and rational use of pesticides is often overlooked, leading to the growing problem of pesticide pollution. Pesticide residues not only endanger human health, but also destroy the ecological balance and pollute the atmosphere as well as soil and water sources. At present, people are becoming increasingly aware of health, food safety, and environmental protection. The number of pesticide residues detected in imported agricultural products is increasing, and the standards for pesticide residue limits are gradually declining. Therefore, in order to monitor the amount of pesticide residues in foods, food pesticide residue testing is conducted. The pre-processing technology research is very important. For the detection of pesticide residues in foods, pesticide residue detectors are generally used for testing.
The Pesticide Residue Tester is a key step in the analysis of pesticide residues before it is analyzed. It is directly related to the accuracy and precision of the entire analysis process. Pesticide residue analysis before treatment refers to the maximum extraction of residual pesticides from the sample, and eliminates interferences in the analysis and detection process, including sample preparation, extraction, purification, concentration and other steps. With the development of science and technology, more and more types of pollutants need to be analyzed, and the content of the components to be measured is getting lower and lower, which poses new challenges to the pretreatment method of the samples. The quality of sample processing directly affects the test results. Therefore, it is more important to study the pretreatment technology of pesticide residues. It is necessary to develop a simple, rapid and effective sample preparation method. The sample was placed in a Soxhlet extractor cannula, an extractant was added to the round bottom flask, and heating was continued for several hours. This method is a classical extraction method, also called a complete extraction method. It is an international standard method. The extraction effect is good, but it takes too much time and there are many interfering substances.
The use of pesticide residue detector to detect pesticide residues, sample pretreatment is one of the important steps in the detection of pesticide residues. It has an important impact on ensuring the accuracy and reliability of the measurement results, reducing the pollution of the column and the detection equipment, and improving the detection efficiency. Future trends must be a way to develop few or even no toxic organic solvents; to develop simple, fast and inexpensive methods with few steps, to extract, purify, and concentrate as much as possible; to develop complex media, trace components, and specialities. The method of the nature (such as high polarity, thermal instability, low volatility, etc.), the combination and automation of development methods, and so on. Because it is only by overcoming the “bottleneck†of pre-processing, the process of pesticide residue analysis in food can achieve a real leap.
The Pesticide Residue Tester is a key step in the analysis of pesticide residues before it is analyzed. It is directly related to the accuracy and precision of the entire analysis process. Pesticide residue analysis before treatment refers to the maximum extraction of residual pesticides from the sample, and eliminates interferences in the analysis and detection process, including sample preparation, extraction, purification, concentration and other steps. With the development of science and technology, more and more types of pollutants need to be analyzed, and the content of the components to be measured is getting lower and lower, which poses new challenges to the pretreatment method of the samples. The quality of sample processing directly affects the test results. Therefore, it is more important to study the pretreatment technology of pesticide residues. It is necessary to develop a simple, rapid and effective sample preparation method. The sample was placed in a Soxhlet extractor cannula, an extractant was added to the round bottom flask, and heating was continued for several hours. This method is a classical extraction method, also called a complete extraction method. It is an international standard method. The extraction effect is good, but it takes too much time and there are many interfering substances.
The use of pesticide residue detector to detect pesticide residues, sample pretreatment is one of the important steps in the detection of pesticide residues. It has an important impact on ensuring the accuracy and reliability of the measurement results, reducing the pollution of the column and the detection equipment, and improving the detection efficiency. Future trends must be a way to develop few or even no toxic organic solvents; to develop simple, fast and inexpensive methods with few steps, to extract, purify, and concentrate as much as possible; to develop complex media, trace components, and specialities. The method of the nature (such as high polarity, thermal instability, low volatility, etc.), the combination and automation of development methods, and so on. Because it is only by overcoming the “bottleneck†of pre-processing, the process of pesticide residue analysis in food can achieve a real leap.
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