A method for rapid determination of pesticide residues in fruits and vegetables by chemical colorimetric method
A technology for rapid determination of pesticide residues, which is used in material analysis by observing the influence of chemical indicators, analysis by chemical reaction of materials, and measuring devices, which can solve imperfections, residual content defects, and troublesome preparation procedures. and other problems, to achieve the effect of wide application range, fast carrier liquid flow rate and high separation efficiency
Inactive Publication Date: 2020-01-14
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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Problems solved by technology
[0003] As a classic and traditional method, gas chromatography is widely used in daily life, but it still has certain defects in the detection of organophosphorus pesticide residues in food
For example, it is impossible to give accurate detection results for easily decomposed high-boiling point organic compounds, and cannot directly give qualitative results.
Compared with the previous methods, the immunization method has certain advantages, but this method is not perfect in our country and cannot be widely used in daily life.
Although the enzyme inhibition method is easy to operate, the instrument is cheap, and the speed is fast, it is especially suitable for the screening and on-site detection of a large number of samples, but the raw material of the enzyme is very expensive, and the preparation process is also very troublesome. It is not practical for laboratory research.
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[0027] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0028] In recent years, with the continuous improvement of people's living standards, people's admiration for healthy food is also increasing. Food safety has become the focus of people's attention. More and more people have begun to pay attention to the quality and safety of fruits and vegetables, especially fruits and vegetables. The problem of excessive pesticide residues in pesticides directly affects the health of consumers. As people pay more and more attention to environmental protection issues and food diversification, and new pesticide varieties continue to enter the market, people pay more and more attention to th...
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Abstract
The invention discloses a method for rapid determination of pesticide residues in fruits and vegetables through a chemical developing method. A Congo red method and a sodium hydroxide-resorcinol method are utilized for determining organophosphorus pesticide, and the chemical developing method of adopting 2,6-phygon-4-imido-chloride as a developer is used for determining carbamate pesticide. A high performance liquid chromatography tandem mass spectrometry method is also included. Under definite chromatographic conditions, the vegetables and the fruits are subjected to analytical detection, the linear relation is good, it is indicated that the high performance liquid chromatography tandem mass spectrometry method can meet the requirement for qualitative and quantitative analysis of the pesticide residues in the fruits and the vegetables, results of determination of precision, repeatability, stability, the adding standard recovery rate, the detection limit and the limit of quantitation show that an instrument is high in sensitivity and easy and convenient to operate, the results are accurate, and the method is good in reliability and repeatability and can be used for determination of the pesticide residues in the vegetables and the fruits.
Description
technical field [0001] The invention belongs to the technical field of determination of pesticide residues in fruits and vegetables, in particular to a method for rapidly determining pesticide residues in fruits and vegetables by a chemical chromogenic method. Background technique [0002] With the development of the national economy and the continuous improvement of people's living standards, people's awareness of the safety of daily food is also getting higher and higher. Since vegetables and fruits are indispensable in people's lives, in order to ensure the health of consumers, it is of great significance to study the rapid and comprehensive determination of organophosphorus pesticide residues and carbamate pesticide residues in fruits and vegetables. [0003] As a classic and traditional method, gas chromatography is widely used in daily life, but it still has certain defects in the detection of organophosphorus pesticide residues in food. For example, accurate detectio...
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IPC IPC(8): G01N21/78G01N30/02
CPCG01N21/78G01N30/02G01N2030/027
Inventor 付大友谭文渊周良芹张小芳袁东
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING