Determination of three tranquillizer residues in animal foods by QuEChERS-high performance liquid chromatography-tandem mass spectrometry

doi:10.3724/SP.J.1123.2017.03043

Abstract

Abstract:

A method for simultaneous determination of chlorpromazine, diazepam and metolazone residues in porcine muscle, fish, liver and kidney was developed using QuEChERS and HPLC-MS/MS technique. The samples were extracted with ethyl acetate and cleaned up with C₁₈, N-propylethylendiamine (PSA) and NH₂ sorbents after using Na₂SO₄ as dehydrating agent. The analytes were separated by a special C₁₈ column, Atlantis T3, and gradiently eluted with a mixed solution of 5 mmol/L formic acid and acetonitrile at a flow rate of 0.35 mL/min. The mass spectrometric analysis that quantified using isotope internal standard, was carried out with electrospray positive ion source (ESI⁺) and multiple reaction monitoring mode (MRM). The linearity of the calibration curves was good in the range of 0.2-5.0 μ g/L. The recoveries at three different spiked levels (0.5, 1 and 5 μ g/kg) in four matrices were in the range of 92.5%-117.8%. The repeatability expressed as relative standard deviations (RSDs) ranged from 0.7% to 11.6% (n=6). The method, with wide matrix range of application, is highly effective and sensitive and suitable for the rapid analysis of large quantities of samples.

Key words: animal foods, high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS), QuEChERS, tranquillizers

CLC Number:

O658

ZOU You, SHAO Linzhi, CHEN Simin, OUYANG Shaolun, LIN Feng. Determination of three tranquillizer residues in animal foods by QuEChERS-high performance liquid chromatography-tandem mass spectrometry[J]. Chinese Journal of Chromatography, 2017, 35(8): 801-807.

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