Rapid detection method for concentration of other trace components incorporated in pesticide

A trace component and concentration technology, applied in the field of spectroscopy, can solve the problems of single reagent, large initial investment, and long detection time, and achieve good scalability, universality, and low cost.

Inactive Publication Date: 2019-02-15
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the above detection methods, chromatography and mass spectrometry have the highest precision, and can be used for accurate analysis and quantitative detection of prohibited pesticide ingredients in the laboratory, but their disadvantages are that the detection process is complicated, the detection time is long, and it consumes manpower and material resources
However, enzyme inhibition methods, immunoassay methods, and biosensor methods have developed rapidly in recent years, but there are still some defects, such as large initial investment, harsh experimental conditions, single reagents, etc.

Method used

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  • Rapid detection method for concentration of other trace components incorporated in pesticide
  • Rapid detection method for concentration of other trace components incorporated in pesticide
  • Rapid detection method for concentration of other trace components incorporated in pesticide

Examples

Experimental program
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Embodiment

[0032] Example: Fipronil Pesticide and Pure Tofenpyrad

[0033] Step 1: Preparation of standard samples: Use a pipette to take 2ml of pure fipronil pesticide and pure tofenpyrad pesticide in total, according to 1:999, 1:499, 3:997, ..., 1:99, 1 :98, 1:97, ..., 1:90 are configured as 0.1%, 0.2%, 0.3%, ..., 1%, 2%, 3%, ... 10% solution, the specific volume used can be determined according to the actual situation The demand for the amount used is scaled up or down proportionally. In this case, each concentration gradient is placed in a cuvette, and the cuvette is placed in the cuvette holder to prevent measurement errors caused by human factors placed during the spectrum acquisition process.

[0034] Step 2: Collection of spectral data: After preparation of samples of all concentrations, spectral data can be collected. In this case, the Vertex 70 Fourier transform near-infrared spectrometer produced by the German Bruker company (the InGaAs detector used by it, the spectral range ...

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Abstract

The invention discloses a rapid detection method for the concentration of other trace components incorporated in pesticide. The method comprises the following steps of: testing concentration spectrumsof different components in a standard sample of the pesticide; preprocessing the tested spectral curve; and establishing a corresponding predicted concentration model by mathematical modeling. When the detection method is used, the concentration of doping components in the pesticide can be obtained only by testing the spectrum of the pesticide to be tested and inputting a prediction model to predict. The prediction can be performed only in the small band of the characteristic wavelength of the pesticide, which is very simple and convenient. The detection concentration limit can be as low as 0.4%, and the detection concentration error is as low as 0.07%. The method is fast, accurate, simple, and low in cost, can realize the detection of different pesticide components according to characteristic spectral information of the different pesticide components, and has good expansibility and universality.

Description

technical field [0001] The invention relates to the field of spectroscopy, in particular to a quantitative analysis method for quickly detecting the concentration of pesticides by spectroscopy. Background technique [0002] With the industrialization of agricultural production, pesticides are an indispensable agricultural input cost in agricultural production. The use of pesticides has made a huge contribution to eliminating pests and diseases and increasing agricultural production. However, the standardized application of pesticides and the quality of pesticides directly affect the effect of pest control and the quality and safety of agricultural products. With the improvement of people's quality of life, people's awareness of agricultural products and food safety has also been continuously strengthened. Pesticides that have been widely used in the past with good effects in controlling diseases and insect pests and low cost have been banned from production and use due to ...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G01N21/359
CPCG01N21/359
Inventor王少伟王雅静朱建国陈效双陆卫
OwnerSHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI