Journal
CHROMATOGRAPHIA
Volume 82, Issue 7, Pages 1089-1099Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s10337-019-03741-w
Keywords
GC-MS; Magnetic solid-phase extraction (MSPE); magG@PDA@TbBd; Covalent organic frameworks (COFs); Phthalic acid esters (PAEs); Detection
Funding
- Ningbo Natural Science Foundation [2018A610279]
- Research Funds of NBU [XYL18025]
- National Natural Science Foundation of China [21475131]
- K. C. Wong Magna Fund in Ningbo University
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The development of functional nanocomposites based on covalent organic framework (COF) is still highly important. In this work, a novel COF-functionalized hydrophilic magnetic graphene (magG@PDA@TbBd) was prepared through a facile and efficient route and applied as a unique magnetic solid-phase extraction matrix for phthalate esters analysis. The obtained magG@PDA@TbBd exhibited excellent water dispersibility, large surface area, strong magnetic response, regular mesoporous structure and strong - electron system. Based on these properties, the newly prepared composite displayed outstanding reusability and potential performances on phthalates analysis with good linearity (50-8000ngmL(-1)) and reliable recoveries (91.4-105.2%). Limit of detection (LOD) varied from 0.004ngmL(-1) to 0.02ngmL(-1), and relative standard deviation (RSD) for intra-day and inter-day were less than 4.4% and 6.7%, respectively. More interestingly, the newly obtained magG@PDA@TbBd was utilized to analyze 9 PAEs in packaged milk samples. This work may open-up a direction in design and construction of functionalized COF-derived composites.
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