Journal
JOURNAL OF SEPARATION SCIENCE
Volume 41, Issue 5, Pages 1129-1137Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.201700927
Keywords
fungicides; high-performance liquid chromatography; magnetic solid-phase extraction; metal-organic frameworks
Categories
Funding
- National Natural Science Foundation of China [21475095, 21305102]
- Tianjin Natural Science Foundation [17JCTPJC47900]
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We adopted a facile hydrofluoric acid-free hydro-/solvothermal method for the preparation of four magnetic iron(III)-based framework composites (MIL-101@Fe3O4-COOH, MIL-101-NH2@Fe3O4-COOH, MIL-53@Fe3O4-COOH, and MIL-53-NH2@Fe3O4-COOH). The obtained four magnetic iron(III)-based framework composites were applied to magnetic separation and enrichment of the fungicides (prochloraz, myclobutanil, tebuconazole, and iprodione) from environmental samples before high-performance liquid chromatographic analysis. MIL-101-NH2@Fe3O4-COOH showed more remarkable pre-concentration ability for the fungicides as compared to the other three magnetic iron(III)-based framework composites. The extraction parameters affecting enrichment efficiency including extraction time, sample pH, elution time, and the desorption solvent were investigated and optimized. Under the optimized conditions, the standard curve of correlation coefficients were all above 0.991, the limits of detection were 0.04-0.4 mu g/L, and the relative standard deviations were below 10.2%. The recoveries of two real water samples ranged from 71.1-99.1% at the low spiking level (30 mu g/L). Therefore, the MIL-101-NH2@Fe3O4-COOH composites are attractive for the rapid and efficient extraction of fungicides from environmental water samples.
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