Acta Agriculturae Zhejiangensis ›› 2026, Vol. 38 ›› Issue (1): 148-159.DOI: 10.3969/j.issn.1004-1524.20250048

• Quality and Safety of Agricultural Products • Previous Articles     Next Articles

Determination of 16 anesthetic residues in fish muscle by magnetic dispersive solid-phase extraction combined with LC-MS/MS

WANG Meiyu1,2(), LIU Zhenzhen2, WANG Xinquan2, WANG Jiao2, LIU Xiaoqi1,2, GU Chenshu1,2, DU Lihui1,*(), QI Peipei1,2,*()   

  1. 1. School of Food Science and Engineering, State Key Laboratory for Quality and Safety of Agro-Products, Ningbo University, Ningbo 315832, Zhejiang, China
    2. Institute of Agro-Product Safety and Nutrition, State Key Laboratory for Quality and Safety of Agro-Products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
  • Received:2025-01-20 Online:2026-01-25 Published:2026-02-11

Abstract:

To establish a simultaneous determination method for 16 anesthetic residues in fish muscle, a detection method for caine-type, benzodiazepines, and phenothiazine anesthetics in fish muscle was developed based on a QuEChERS pretreatment technique using magnetic nanomaterials as clean-up adsorbents, combined with liquid chromatography-tandem mass spectrometry (LC-MS/MS). The effects of extraction solvent type, the dosage of magnetic nanomaterial Fe3O4@SiO2@DVB-NVP(polyvinylphenylpyrrolidone, Fe3O4-PLS) and N-propylethylenediamine(PSA) on the recovery rate of the target substance were optimized. It was determined that 0.5%(volume fraction) acetic acid in acetonitrile was used as the extractant, sodium chloride (NaCl) and anhydrous magnesium sulfate (MgSO4) were used as the salting out and water removal materials, and 20 mg Fe3O4-PLS and 10 mg PSA were used as the purification and adsorption materials. In the positive ion electrospray mode, the Luna Omega C18 chromatographic column(100 mm×2.1 mm, 1.6 μm) was used for separation and quantification by the external standard method. The results showed that the 16 anesthetics had good linearity within the range of 0.5 to 200 μg·kg-1, with correlation coefficient(r) ≥ 0.996, and the limit of detection(LOD) of the instrument was 0.08-0.57 μg·L-1. At the addition levels of 1, 10, and 100 μg·kg-1, the average spiked recovery rates of the 16 anesthetics ranged from 72.4% to 110.8%, with intra-day relative standard deviation (RSD) of 0.4%-7.7%. In the analysis of real samples, the detection rates for tricaine and benzocaine were 26.1% and 39.1%, respectively, with detected mass fraction ranges of 2.07-6.34 μg·kg-1 and 1.44-2.87 μg·kg-1, respectively. This method has good practicability and can provide reference for the high-throughput residue analysis of the 16 kinds of anesthetics in fish muscle.

Key words: magnetic nano material, liquid chromatography-tandem mass spectrometry(LC-MS/MS), anesthetic, fish

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