In recent years, with the continuous improvement and maturity of pesticide residue analysis technology, the extraction and purification technology of pyrethroid pesticide residues in the ultra-trace category of Chinese herbal medicines has also achieved rapid development. Some methods such as solid-phase extraction, microwave extraction, pesticide residue detector and solid-phase microextraction are fast, simple, and high recovery methods are applied to the analysis and detection of pyrethroid pesticide residues in Chinese herbal medicines, which greatly saves the pretreatment of samples. Manpower and material resources.
Pesticide residue detector sample analysis and detection technology is currently relatively mature, has been widely used in the analysis of pyrethroid pesticide residues in Chinese herbal medicines, and has achieved good research results, which can basically meet the needs of analysis and detection at this stage. However, the pesticide residue detector method has a relatively high gasification temperature, and it is easy to decompose some thermally unstable pyrethroids, and the ultraviolet detectors commonly used in high performance liquid chromatography have low sensitivity and selectivity.
At present, the pretreatment technology for the detection of pyrethroid pesticide residues in Chinese herbal medicines is relatively backward, and commonly used techniques such as oscillation extraction and ultrasonic assisted extraction are relatively large in solvent consumption and are cumbersome to operate. Sample detection technology is dominated by pesticide residue detectors. The most important problem in the determination of pyrethroid pesticide residues by the pesticide residue detector method is the destruction of partially thermally unstable pyrethroids at high temperature gasification, and the accuracy of the detection. Greater impact.
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