Collaborative compounding of metal?organic frameworks for dispersive solid-phase extraction HPLC?MS/MS determination of tetracyclines in honey

Pang, YH; Lv, ZY; Sun, JC; Yang, C; Shen, XF

Abstract

Metal-organic frameworks (MOFs), a sort of dispersive solid-phase extraction (d-SPE) material, has shown considerable prospects in the pretreatment of food, biological and other complex samples. Herein, we developed a method for compounding MOFs for d-SPE and trace determination of tetracyclines (TCs) in honey. When the compounding ratio of MIL-101 (Cr), MIL-100 (Fe) and MIL-53 (Al) was 7:1:2, adsorption?extraction was effective. Followed by high-performance liquid chromatography?tandem mass spectrometry (HPLC?MS/MS), the limits of detection were 0.073?0.435 ng/g and the limits of quantitation ranged from 0.239 to 1.449 ng/g for oxytetracycline, tetracycline, chlortetracycline and doxycycline. The method was applied to four kinds of honey samples with recoveries from 88.1% to 126.2%. The compounding of MOFs provides a strategy for purification and multi-target extraction from complex food matrices by d-SPE.

Keywords: Tetracyclines; Honey; Metal?organic frameworks; Dispersive solid-phase extraction; Liquid chromatography?tandem mass; spectrometry

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