期刊
JOURNAL OF SEPARATION SCIENCE
卷 42, 期 7, 页码 1451-1458出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.201801169
关键词
magnetic dispersive solid-phase extraction; magnetic graphene oxide composite; nitrogen heterocycles
资金
- National Natural Science Foundation of China [31701695, 31501571]
- Special Fund for the Industrial System Construction of Modern Agriculture of China [CARS-23-E03]
We present a simple method for the fabrication of a magnetic amino-functionalized zinc metal-organic framework based on a magnetic graphene oxide composite. The resultant framework exhibited a porous 3D structure, high surface area and good adsorption properties for nitrogen-containing heterocyclic fungicides. The adsorption process and capacity indicated that the primary adsorption mechanism might be hydrogen bonding and p-p conjugation. In addition, an optimized protocol for magnetic solid phase extraction was developed (such as adsorbent content, pH, and desorption solvent), and utilized for the extraction of nitrogen-containing heterocyclic fungicides from vegetable samples. Quantitation by high performance liquid chromatography coupled with tandem mass spectrometry offered a detection limit of 0.211.0 mu g/L (S/N = 3) with correlation coefficients larger than 0.9975. These results demonstrate that magnetic amino-functionalized zinc metal-organic framewor is a promising adsorbent for the extraction and quantitation of nitrogen-containing heterocyclic fungicides.
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