期刊
MICROCHIMICA ACTA
卷 183, 期 4, 页码 1417-1423出版社
SPRINGER WIEN
DOI: 10.1007/s00604-016-1768-9
关键词
Restricted-access materials; Magnetic microspheres; Boronic acid; Solid-phase extraction; Core-shell microspheres; Fe3O4@SiO2; Scanning electron microscopy
资金
- National Natural Science Foundation of China [81402899]
- Shandong Provincial Natural Science Foundation, China [ZR2014HP020]
Epoxy propyl bonded magnetic microspheres were prepared by atomic layer deposition using Fe3O4@SiO2 microspheres as a core support material. Then, a restricted-access magnetic sorbent was prepared that contains diol groups on the external surface and m-aminophenylboronic acid groups on the internal surface. This kind of microspheres achieved excellent specific adsorption of the ortho-dihydroxy compounds (dopamine, adrenaline and noradrenaline). Following desorption with sorbitol, the ortho-dihydroxy compounds were quantified by HPLC. The limits of detection for dopamine, adrenaline and noradrenaline were 0.074, 0.053 and 0.095 mu g mL(-1), respectively. Recoveries from spiked mice serum samples range from 80.2 to 89.1 %.
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