Solid phase extraction and capillary electrophoretic separation of racemic catecholamines by using magnetic particles coated with a copolymer prepared from poly(3,4-dihydroxyphenylalanine) and polyethyleneimine
Solid phase extraction and capillary electrophoretic separation of racemic catecholamines by using magnetic particles coated with a copolymer prepared from poly(3,4-dihydroxyphenylalanine) and polyethyleneimine
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聚(3,4-二羟基苯丙氨酸)与聚乙烯亚胺共聚物包覆磁性颗粒固相萃取毛细管电泳分离外消旋儿茶酚胺
DOI：
10.1007/s00604-019-3731-z
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发表时间：
2019-08
影响因子：
5.7
通讯作者：
Jia Li
中科院分区：
文献类型：
--
作者：
Wu Jia;Li Zhenqun;Jia Li
A method is presented for chiral separation of catecholamines present in bovine and mice blood. It combines magnetic solid phase extraction (MSPE) and chiral capillary electrophoresis (ch-CE). A copolymer consisting of poly(3,4-dihydroxyphenylalanine) and polyethyleneimine was coated onto magnetic particles (MPs) by co-deposition using the CuSO4/H2O2 system as a polymerization initiator. The coated MPs are spherical and the average diameter is about 168 ± 4 nm. The thickness of the coating is approximately 19 nm. The functional MPs are used as sorbents in MSPE to simultaneously extract the catecholamines epinephrine, norepinephrine and isoprenaline. Under the optimum conditions, the extraction efficiencies for those catecholamines are in the range from 92.3 to 98.3%, with relative standard deviations (RSDs) of <5.3%. The extraction can be performed within 4 min. The extracts were then submitted to ch-CE. A method for field-enhanced sample injection (FESI) was used to enhance the detection sensitivities of the enantiomers. The limits of detection for catecholamine enantiomers range from 400 to 600 pg mL−1. In comparison with the FESI-ch-CE method, the sensitivity enhancement factors of the MSPE/ch-CE method for catecholamines are about 10-fold. The method was applied to the determination of trace levels of catecholamine enantiomers in (spiked) bovine and mice blood. The recoveries ranged from 88.2 to 93.8%, with RSDs of <5.5%. The whole detection procedure takes less than 30 min. Graphical abstract Schematic representation of the separation and detection of catecholamine enantiomers in blood by combination of polyDOPA/PEI-magnetic particles-based solid phase extraction and chiral-capillary electrophoresis. Schematic representation of the separation and detection of catecholamine enantiomers in blood by combination of polyDOPA/PEI-magnetic particles-based solid phase extraction and chiral-capillary electrophoresis.
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影响因子：
2.8
作者：
John P. Utz;Louis S. Goodman;Alfred Gilman
通讯作者：
John P. Utz;Louis S. Goodman;Alfred Gilman
基于溶出相固化的载体介导液相微萃取测定人尿液中单胺类神经递质
影响因子：
6.1
作者：
Jiang, Liwei;Chen, Yibang;Chen, Bo
通讯作者：
Chen, Bo
影响因子：
7
作者：
Martin, Miriam;Salazar, Pedro;Luis Gonzalez-Mora, Jose
通讯作者：
Luis Gonzalez-Mora, Jose
影响因子：
6.2
作者：
Park, Ji Won;Bae, Ki Hyun;Park, Tae Gwan
通讯作者：
Park, Tae Gwan
DOI：
10.1001/jama.1991.03460200114048
发表时间：
1991-05
期刊：
JAMA
影响因子：
--
作者：
Robert C. Hastings;Gillis W. Long
通讯作者：
Robert C. Hastings;Gillis W. Long