Journal
MICROCHIMICA ACTA
Volume 185, Issue 3, Pages -Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-018-2732-7
Keywords
Boronic acid; Atom transfer radical polymerization; Magnetic solid phase extraction; Selectivity; Salt effect; Adenosine; Salbutamol; Catecholamines; Urine sample
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Funding
- National Natural Science Foundation in China [21575114, 21475104, 21775121]
- Shaanxi Provincial Education Department [16JS114]
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Poly(3-acrylamidophenylboronic acid) (PAAPBA) was grafted onto polydopamine-coated magnetic graphene oxide via surface-initiated atom transfer radical polymerization to obtain a new kind of boronate affinity material (BAM). The BAM possesses good water dispersity and adsorption capacities as high as 154, 357, 588 and 1111 mu mol.g(-1) for adenosine, salbutamol, dopamine and catechol, respectively. For the molecules without nitrogen atoms, the BAM can selectively capture the cis-diols under the interference of non-cis-diols. For molecules containing nitrogen, the non-cis-diols are also retained, but much less than the cis-diols. The selectivity can be improved by adding salts to facilitate complexation and to suppress the electrostatic interaction between cis-diols and the boronic acid ligand. The BAM was successfully employed to the enrichment of catecholamines from real urine samples. Results indicate that it is a promising material for the pretreatment of real samples.
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