Water retention type pesticide residue detection method suitable for spongy wet soil

Abstract

The invention discloses a water retention type pesticide residue detection method suitable for spongy wet soil, which belongs to the technical field of soil pesticide residue detection. The inventiondiscloses a water retention type pesticide residue detection method suitable for spongy wet soil. A double-cavity closed sampler is arranged, and the double-cavity closed sampler comprises an inner cavity and an outer cavity. The detection method comprises the following steps of selecting a complete area in a target detection place, and enabling a detector to take out a soil sample from the area by using a double-cavity closed sampler. The double-cavity closed sampler is used for sampling soil; a soil sample which is not extruded and compacted and a soil sample which loses water after being extruded are obtained; by performing classification detection on two parts of soil samples and an average sample obtained by mixing the two parts of soil samples, the content of residual pesticide before and after the soil is extruded can be analyzed, and the influence of extrusion on a soil detection result is detected, so that a relatively accurate detection result is obtained.

Description

technical field [0001] The invention relates to the technical field of soil pesticide residue detection, in particular to a water-retaining pesticide residue detection method suitable for loose moist soil. Background technique [0002] Pesticide residues are the general term for trace pesticide precursors, toxic metabolites, degradation products, and impurities that remain in organisms, crops, soil, water, and the atmosphere without being decomposed within a period of time after pesticide use. Some of the pesticides applied to crops are attached to the crops, some are scattered in the soil, air and water environment, and some of the pesticides remaining in the environment will be absorbed by plants. Pesticide residues reach humans and animals directly through plant fruits, water, and air, or pass through the environment and food chain to humans and animals, thereby endangering human health. [0003] Soil is an important environment for the survival and life of organisms and...

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Problems solved by technology

[0004] When testing soil pesticide residues, it is necessary to use a sampler to sample the soil. When sampling, insert the sampler vertically into the soil, the soil enters the sampler, and then the soil is brought out by friction, but in the process of inserting the sampler In the process, the sampler will squeeze the soil, and the inside of the sampler will also compact the soil to ensure the friction between the soil and the sampler, so that the water in the soil will be greatly lost due to extrusion, especially in the soil In the case of high humidity, the loss of water will greatly reduce the amount of pesticides in the soil, which will seriously affect the test results; secondly, it is easy to cause the soil to fall out by friction, especially not suitable for loose soil

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