Residue detection method for quinclorac in tobacco leaf and tobacco planting soil

Abstract

The invention discloses a residue detection method for quinclorac in tobacco leaf and tobacco planting soil, belonging to the technical field of physical and chemical detection of residue of a paddy field herbicide. The residue detection method for the quinclorac in the tobacco leaf and the soil is researched by using high-performance liquid chromatography. The tobacco leaf and the tobacco planting soil are subjected to extraction by using 0.05 mol / L sodium hydroxide solution, liquid-liquid partition by using ethyl acetate and are purified by using a graphitized carbon and florisil mixed solid-phase extraction small column. When the addition level in the tobacco leaf and the soil is 0.05-2.00 mg / L, the average recovery rates of the tobacco leaf and the soil are 79.4-94.9 percent and 92.9-108.2 percent respectively, and the relative standard deviations are 8.1-12.9 percent and 5.5-9.6 percent respectively. The method has the advantages of easy, convenient and fast pretreatment method, low cost and high accuracy and precision, and can be used for providing reference for residue detection and fate research of the quinclorac in the tobacco leaf and the soil in a paddy-tobacco crop rotation system.

Description

technical field [0001] The invention belongs to the technical field of physical and chemical detection of herbicide residues in paddy fields, and mainly relates to a detection method of quinclorac residues in tobacco leaves and tobacco planting soil. Background technique [0002] The application of herbicides has greatly reduced labor intensity, directly or indirectly increased agricultural production levels, and played a significant role in agricultural harvests. However, herbicides are different from insecticides and fungicides, and the requirements for use are stricter. Once used improperly, phytotoxicity will occur. At the same time, as a kind of chemical, herbicides have strong stability. If the herbicides with long residual period and insoluble herbicides are used in the previous crops, it is easy to cause phytotoxicity in the sensitive crops of the subsequent crops. [0003] Quinclorac, the chemical name is 3,7-dichloro-8-quinoline carboxylic acid, is a new type of ...

AI Technical Summary

Problems solved by technology

However, due to blind application and increased doses, crops will suffer from phytotoxicity, especially the residues in the soil in the tobacco-rice rotation area will cause toxicity to the tobacco leaves of the subsequent rotation crops

At present, there have been many reports on the research methods of quinclorac residue detection methods in crops, but due to the extremely complex composition of the tobacco matrix, there are many problems and difficulties in the existing quinclorac residue detection methods applied to tobacco

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