Journal
TALANTA
Volume 206, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.talanta.2019.120179
Keywords
Microporous organic network; Composite; Magnetic solid phase extraction; Endocrine disrupting chemicals
Categories
Funding
- National Key Research and Development Program of China [2018YFC1602401]
- National Natural Science Foundation of China [21777074, 21775056]
- National Basic Research Program of China [2015CB932001]
- Tianjin Natural Science Foundation [18JCQNJC05700]
- Fundamental Research Funds for Central Universities
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In this work, the magnetic amino-functionalized microporous organic network composites (Fe3O4@MON-NHz) were rational designed and facile synthesized for magnetic solid phase extraction (MSPE) of endocrine disrupting chemicals (EDCs), followed by their analysis with high-performance liquid chromatography. The incorporation of amino groups (hydrogen bonding sites) into hydrophobic MON-NH2 networks led to their good enrichment for four typical EDCs bisphenol A (BPA), 4-alpha-cumylphenol (4-alpha-CP), 4-tert-octylphenol (4-t-OP) and 4-nonylphenol (4-NP) relying on the pre-designed hydrogen bonding, pi-pi and hydrophobic interactions. The combination of MON-NH2 shell and magnetic Fe3O4 core provided a fast extraction of BPA, 4-a-CP, 4-t-OP and 4-NP from matrix solution. Under the optimal conditions, the developed method offered good linearity (R-2 > 0.990) in the range of 0.05-1000 mu g L-1, low limits of detection (S/N = 3) of 0.015-0.030 mu g L-1 and large enrichment factors of 172-197 for the studied EDCs. The maximum adsorption capacities of BPA, 4-alpha-CP, 4-t-OP and 4-NP were 124.1, 105.6, 116.6 and 117.9 mg g(-1), respectively. The Fe3O4@MON-NH2 gave larger selectivity for other polar phenols than non-polar polycyclic aromatic hydrocarbons, revealing the dominant role of hydrogen bonding interaction during the extraction and the potential of Fe3O4@MON-NH2 for other polar phenols. The developed method was successfully applied for the analysis of EDCs in water, orange juice and beverage bottle samples with the recoveries of 80.3-109.5%. These results revealed the potential of functional MONs as efficient adsorbents in sample pretreatment.
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