Method for extracting pesticide from curcuma wenyujin

Abstract

The invention belongs to the field of pharmaceutical analysis and discloses a method for extracting pesticide from curcuma wenyujin. The method comprises the following steps that: a curcuma wenyujin medicinal material is pretreated, so that a curcuma wenyujin test solution can be obtained; a eutectic solvent is prepared; eutectic solvent functionalized graphene is prepared with the prepared eutectic solvent; dispersive micro-solid-phase extraction is performed on the curcuma wenyujin test solution with the eutectic solvent functionalized graphene adopted as an adsorbent, and an eluent is centrifuged and filtered, so that sample injection is carried out, and the pesticide enrichment effect of the curcuma wenyujin is analyzed and characterized. According to the method of the invention, the eutectic solvent functionalized graphene is adopted as the adsorbent so as to be applied to the enrichment technology of dispersive micro-solid phase extraction, and can be applied to the field of theenrichment and detection of pesticide residues in traditional Chinese medicinal materials; and the eutectic solvent is low in melting point, low in toxicity, easy to synthesize and easy to biodegrade;the surface area of the graphene is large, so that the graphene can easily adsorb and desorb various compounds; and the graphene obtained through the functional modification of the eutectic solvent has good dispersity and stability in an aqueous solution, and therefore, the reliability of the method is guaranteed.

Description

technical field [0001] The invention relates to the field of drug analysis, in particular to a method for extracting pesticides from curcuma curcuma. Background technique [0002] Curcuma wenyujin (Curcuma wenyujin) is a plant of the genus Curcuma in the Zingiberaceae family. Its roots and rhizomes are used for medicinal purposes. Curcuma wenyujin is one of the famous authentic medicinal materials "Zhejiang Eight Flavors" in Zhejiang Province. Thrombosis and other effects, the market value is extremely high. In recent years, with the increasing demand for traditional Chinese medicine and the increasing shortage of wild Chinese medicinal resources, artificial planting has become the mainstream source of Chinese medicinal materials. In the large-scale planting of Chinese medicinal materials, pests and diseases are inevitable. Pesticides such as organochlorine pesticides, organophosphorus pesticides and pyrethroid insecticides are widely used. However, pesticides dispersed in...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to overcome the existing detection methods for pesticides in complex matrices, which usually have the disadvantages of low sensitivity, large consumption of organic solvents, cumbersome methods, etc., which are not conducive to practical application. The eutectic solvent interacts with graphene powder, and as an adsorbent for dispersed micro-solid phase extraction technology, it can extract and detect pesticide components in Chinese herbal medicines stably, reliably, quickly and sensitively, with less consumption of organic solvents, no need for large-scale instrument assistance and sample pretreatment easy to use

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