Journal
MICROCHIMICA ACTA
Volume 186, Issue 4, Pages -Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-019-3358-0
Keywords
One-pot fabrication; Phenylurea; Triazine; Pre-concentration; Organic pollutants; High performance liquid chromatography
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Funding
- National Nature Science Foundation of China [21707061, 51672116]
- Research Fund for the Doctoral Program of Liaoning Province [20180540060]
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Magnetic porous microspheres composed of Fe3C, MnO and graphitic carbon (Fe3C/MnO/GC) were prepared by a one-pot method. A polycondensate obtained from urea and formaldehyde served as the carbon source and was calcined in the presence of metallic iron and manganese to yield Fe3C/MnO/GC. The resultant hybrid has highly mesoporous architecture, large specific surface, graphitic structure and adequate saturation magnetism. It is shown to possess excellent pre-concentration ability for herbicides (monuron, chlortoluron, atrazine and terbutylhylazine). The sorbent can be easily separated and has a long service lifetime (>25cycles). Under optimized conditions, the sorbent excels by good recoveries (78-120%), high enrichment factors (45-50) and good precision (RSDs <= 10.7%). The limits of detection are 0.01-0.10 gL(-1) for (spiked) water samples, 0.22-0.87 mu g kg(-1) for grape samples, and 0.18-0.74 mu g kg(-1) for potato samples. This work offers a new strategy for the construction of magnetic bimetallic heterostructured GC hybrids.
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