Journal
FOOD CHEMISTRY
Volume 321, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2020.126702
Keywords
Scholl-coupling mesoporous polymer; Online solid-phase extraction; Plant growth regulators; High-performance liquid chromatography, bean sprout
Funding
- National Natural Science Foundation of China [31972145]
- Key Science and Technology Program of Shandong [2019GSF108014]
- Shandong Agricultural Applied Technology Innovation Project (2018)
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A new amino-modified Scholl-coupling mesoporous polymer (NH2@SMPA)-online solid-phase extraction method, coupled with high-performance liquid chromatography (online SPE-HPLC) was established for the analysis of six plant growth regulators (PGRs) in bean sprouts. NH2@SMPA was synthesized by acid-catalyzed deacetylation of acetylamino-Scholl-coupling mesoporous polymer (SMPA). The diversity of functional groups, such as aromatic, acetylamino, and -NH2, was conducive to multiple binding interactions between NH2@SMPA and PGRs. NH2@SMPA exhibited superior extraction capability for PGRs, compared with SMPA and commercial adsorbents. The extraction conditions, including loading solvent, pH of loading solution, eluting solvent, and flow rates of loading and elution, were optimized. Under the optimized conditions, wide linear ranges (0.01-500 mu g kg(-1)) and low detection limits (2.34-20.2 ng kg(-1)) were obtained. The recoveries were satisfactory, i.e., 86.0% to 109% with relative standard deviations <= 9.8% (n = 3). Finally, the online SPE-HPLC method was successfully used for determination of PGRs in bean sprouts.
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