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Abstract:
A CE with LIF detection was developed for the separation and determination of three bradykinin (BK) metabolites: BK2-9, BK1-7 and BK1-5. BK fragments were derivatized with 5-(4, 6-dichloro-s-triazin-2-ylamino) fluorescein before CE-LIF analysis. Eighty millimolar of Tris-H3PO4 (pH 9.0) was selected as the derivatization media. Three BK fragments were baseline separated within 10 min by using 0.2M TAPS-Tris buffer (pH 8.5) as the running buffer. Meanwhile we have also developed a simple, quick, and sensitive on-column transient ITP preconcentration for CE-LIF detection of three BK fragments. Ten millimolar of Tris-HCl (pH 9.0) was chosen as the leading electrolyte and 0.2M TAPS-Tris (pH 8.5) containing 10mM 1-butyl-3-methylimidazolium tetra-fluoroborate as the terminating electrolyte and also served as the running buffer during CZE separation. By using this transient ITP coupled with CE-LIF, concentration detection limits (S/N=3) for BK2-9, BK1-7 and BK1-5 were 0.3, 0.1 and 0.1 pmol/L, respectively. This method has been applied to the assay of human saliva and plasma samples with satisfactory results. © 2009 Wiley-VCH Verlag GmbH & Co. KGaA.
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Electrophoresis
ISSN: 0173-0835
Year: 2009
Issue: 13
Volume: 30
Page: 2300-2306
3 . 0 7 7
JCR@2009
3 . 0 0 0
JCR@2023
JCR Journal Grade:1
CAS Journal Grade:1
Cited Count:
SCOPUS Cited Count: 13
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 1
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