A method for on-site rapid detection of pesticide emulsifiable concentrate preparations

Abstract

The invention relates to the technical field of pesticide detection and particularly relates to a method for carrying out spot rapid detection on a pesticide emulsion preparation. According to the method, effective constituents and constituent concentrations of the pesticide emulsion preparation and prohibited constituent containing condition of the pesticide emulsion preparation are detected on spot based on a Raman spectrum theory, the distinguishable constituents include more than 30 normal pesticides and more than 10 prohibited or restricted pesticides, and the testing of a single sample can be finished within 30 minutes. After being contrasted and verified with objective results including a detection result of an authored pesticide detection mechanism, the method has the characteristics that the qualitative detection rate reaches 76.7%, the total accuracy rate reaches 73.3%, and the accuracy rate reaches 59.3% when the quantitative measurement error is less than 30%, and reaches 48.1% when the quantitative measurement error is less than 20%. Compared with laboratorial chromatogram and mass spectrum methods, the method disclosed by the invention has the advantages of simplicity in operation, capability of spot test, short testing time and the like.

Description

technical field [0001] The invention relates to the technical field of pesticide detection, in particular to a method for on-site rapid detection of pesticide emulsifiable concentrate preparations. Background technique [0002] At present, there is still no rapid detection technology that can be used in the field of pesticide detection. The monitoring of pesticides on the market generally adopts the method of sampling and sending to the detection and experiment center of the agricultural department for detection. The main detection methods are chromatographs and chromatograms. Expensive, complex testing technology, and few qualified testing points. In many places, only prefecture-level cities or even provincial-level institutions can conduct testing, resulting in high cost of inspection and long feedback time, which seriously affects grassroots monitoring and law enforcement departments to crack down on illegal activities. The working efficiency of pesticides exceeding the s...

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Problems solved by technology

[0002] At present, there is still no rapid detection technology that can be used in the field of pesticide detection. The monitoring of pesticides on the market generally adopts the method of sampling and sending to the detection and experiment center of the agricultural department for detection. The main detection methods are chromatographs and chromatograms. Expensive, complex testing technology, and few qualified testing points. In many places, only prefecture-level cities or even provincial-level institutions can conduct testing, resulting in high cost of inspection and long feedback time, which seriously affects grassroots monitoring and law enforcement departments to crack down on illegal activities. Work efficiency of pesticides exceeding standard

[0003] Raman spectroscopy is a technology developed in the past 10 years. It has the advantages of fast, simple, non-destructive and direct detection of samples, and is very suitable as a rapid on-site detection method. The function is still limited to the category of pure substance identification, and cannot be directly used for the detection of mixtures such as pesticides

Most research institutes and colleges on the use of Raman spectroscopy for pesticide detection are still limited to preliminary feasibility studies on the qualitative and quantitative detection of a few types of pesticides with known components. , Unknown, complex pesticides have the ability to detect and distinguish, and there is no systematic research report yet

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