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author:

Lin, Zian (Lin, Zian.) [1] | Xie, Zenghong (Xie, Zenghong.) [2] (Scholars:谢增鸿)

Indexed by:

EI Scopus SCIE

Abstract:

A pressurized CEC (pCEC) coupled with on-column chemiluminescence (CL) detection was developed for direct determination of amino acids, which was based on the principle of an enhanced effect of Cu(II)-amino acid complexes on the CL reaction between luminol and hydrogen peroxide in alkaline solution. The effects of some important factors on pCEC separation and CL intensity were systemically investigated. Baseline separation of amino acids including L-histidine (L-His), L-threonine (L-Thr), and L-tyrosine (L-Tyr) was achieved by using a monolithic column with a mobile phase of 5.0 x 10(-3) mol/L phosphate buffer at pH 8.0 that contained 25% v/v methanol and 5.0 x 10(-4) mol/L luminol and 1.0 x 10(-5) mol/L Cu(II) at an applied voltage of -5 kV. The calibration curves of the analytes by plotting the peak height against corresponding concentration were linear over the range of 3.2 x 10(-6) similar to 3.2 x 10(-4) mol/L, for L-His, 4.1 x 10(-6) similar to 4.1 x 10(-4) mol/L for L-Thr, and 6.0 x 10(-7) similar to 3.0 x 10(-4) mol/L for L-Tyr. The LODs for L-His, L-Thr, and L-Tyr were 6.4 x 10(-7), 8.4 x 10(-7), and 3.0 x 10(-7) mol/L (S/N = 2), respectively. The proposed method was applied to the analysis of amino acid injection sample with satisfactory results. Mean recoveries for three amino acids were from 84.3 to 89.6%.

Keyword:

amino acids chemiluminescence pressurized capillary electrochromatography

Community:

  • [ 1 ] [Lin, Zian]Nankai Univ, Coll Chem, Tianjin 300071, Peoples R China
  • [ 2 ] [Xie, Zenghong]Fuzhou Univ, Dept Chem, Fuzhou 350002, Peoples R China

Reprint 's Address:

  • [Lin, Zian]Nankai Univ, Coll Chem, Tianjin 300071, Peoples R China

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Source :

JOURNAL OF SEPARATION SCIENCE

ISSN: 1615-9306

Year: 2008

Issue: 15

Volume: 31

Page: 2852-2859

2 . 7 4 6

JCR@2008

2 . 8 0 0

JCR@2023

ESI Discipline: CHEMISTRY;

JCR Journal Grade:1

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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