Journal of Zhejiang Agricultural Sciences ›› 2025, Vol. 66 ›› Issue (11): 2685-2690.DOI: 10.16178/j.issn.0528-9017.20240655

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Determination of 6 pesticde residues in Dendrobium officinale by HPLC-MS/MS combined with QuEChERS

LANG Wenjun(), XU Xiaoying(), LIANG Jingjing   

  1. Zhejiang Provincial Key Laboratory for Market Regulation and Health Food Quality and Safety, National Key Laboratory of Market Supervision (Quality and Safety of Functional Food), Zhejiang Provincial Market Supervision Administration Key LaboratoryControl (Key Laboratory of Health Food Quality and Safety), Hangzhou 310052, Zhejiang
  • Received:2024-08-14 Online:2025-11-11 Published:2025-12-01

Abstract:

To establish a detection method for six pesticide residues in Dendrobium officinale, including difenoconazole, prochloraz, dimethomorph, imidacloprid, quinolinone, and thifluzamide, the samples were extracted with acetonitrile, purified by QuEChERS (quick, easy, cheap, effective, rugged, safe), and analyzed by high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS). The results showed that 6 kinds of pesticide residues showed a good linear relationship within the corresponding mass concentration range, with a correlation coefficient of r>0.990 0. The spike recovery rates were 72.7%-110.7% at 1, 2, 5 times quantitation limits, and the relative standard deviations (RSD) ranged from 2.3%-4.1%. The detection limits of imidacloprid and quinolinone were 10 μg·kg-1, and the detection limits of the other 4 kinds of pesticide residues were 1 μg·kg-1. The established method is accurate and stable, with small matrix interference and high sensitivity, which provides technical support for the safety detection and quality control of pesticide residues in Dendrobium officinale.

Key words: Dendrobium officinale, pesticide residues, QuEChERS, HPLC-MS/MS

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