期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 67, 期 41, 页码 11527-11535出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.9b03127
关键词
magnetic nanoporous polymer; adsorbent; extraction; 5-nitroimidazoles; milk; high-performance liquid chromatography
资金
- National Natural Science Foundation of China [31571925, 31671930]
- Natural Science Foundation of Hebei Province [B2017204025]
- Returned Overseas Scholars Foundation of Hebei Province [CL201713]
A magnetic nanoporous organic polymer (M-NOP) was prepared as a new adsorbent with excellent extraction capacity and rapid adsorption kinetics for 5-nitroimidazoles (5-NDZs). Hence, a rapid and effective method was proposed for determination of 5-NDZs in milk by combining M-NOP-based magnetic solid-phase extraction with high-performance liquid chromatography. Main extraction conditions were investigated. Under optimal conditions, good linear response was achieved in a range of 2.4-100 ng mL(-1) with a lower detection limit of 0.8-1.0 ng mL(-1). High accuracy with a recovery of 80.0-116.0% for the fortified samples, good repeatability with relative standard deviation below 10%, and a high enrichment factor of 97-111 were obtained. The rapid adsorption of 5-NDZs on M-NOP is mainly driven by H-bonding, pi-stacking, and polar interactions. Finally, the M-NOP-based method-was successfully used to determine 5-NDZs in milk samples. The M-NOP is expected to present promising application in the extraction and quantitative analysis of other compounds.
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