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author:

Huang, Y. (Huang, Y..) [1] | Duan, J. (Duan, J..) [2] | Chen, H. (Chen, H..) [3] | Chen, M. (Chen, M..) [4] | Chen, G. (Chen, G..) [5]

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Scopus

Abstract:

A capillary electrophoresis (CE) method with laser-induced fluorescence (LIF) detection was developed for the separation and detection of carnosine-related peptides (carnosine, anserine, and homocarnosine). A sensitive and fluorogenic regent, 3-(4-carboxybenzoyl) quinoline-2-carboxaldehyde (CBQCA) was selected as a precapillary labeling reagent for imidazole dipeptides to form isoindole derivatives. The optimized molar ratio between CBQCA and peptide was found to be 75:1, and 50 mmol/L borate buffer (pH 9.2) was used for the derivatization in order to achieve good efficiency. Three imidazole dipeptides were baseline-separated within 20 min by using 112 mmol/L sodium borate (pH 10.4-10.8) as running buffer. Concentration detection limits (signal-to-noise ratios) for carnosine, anserine, and homocarnosine were 4.73, 4.37, and 3.94 nmol/L, respectively. This method has been applied to the analysis of human cerebrospinal fluid (CSF) and meat dry powder of pig and sheep. Recoveries were in the range of 82.9-104.8% for homocarnosine in CSF. For carnosine and anserine, the recoveries are 98.3% and 80.2% in meat dry powder of pig and 111.2% and 112.8% in meat dry powder of sheep, respectively. © 2005 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keyword:

3-(4-Carboxybenzoyl) quinoline-2-carboxaldehyde; Capillary electrophoresis; Carnosine-related dipeptides; Laser-induced fluorescence

Community:

  • [ 1 ] [Huang, Y.]Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350002, China
  • [ 2 ] [Huang, Y.]Department of Chemistry, Fujian Norman University, Fuzhou, Fujian, China
  • [ 3 ] [Duan, J.]Analytical and Testing Center, Fuzhou University, Fuzhou, Fujian 350002, China
  • [ 4 ] [Chen, H.]Analytical and Testing Center, Fuzhou University, Fuzhou, Fujian 350002, China
  • [ 5 ] [Chen, M.]Center for Medical Laboratory, Fuzhou General Hospital, Fuzhou, Fujian, China
  • [ 6 ] [Chen, G.]Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350002, China

Reprint 's Address:

  • [Chen, G.]Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350002, China

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Source :

Electrophoresis

ISSN: 0173-0835

Year: 2005

Issue: 3

Volume: 26

Page: 593-599

3 . 8 5

JCR@2005

3 . 0 0 0

JCR@2023

JCR Journal Grade:1

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 45

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 3

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