TY  - JOUR
AU  - Žunić, G.D
AU  - Spasić, S
AU  - Jelić-Ivanović, Zorana
PY  - 2012
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1799
AB  - Whole blood and/or plasma amino acids are useful for monitoring whole body protein and amino acid metabolism in an organism under various physiological and pathophysiological conditions. Various methodological procedures are in use for their measurement in biological fluids. From the time when capillary electrophoresis was introduced as a technology offering rapid separation of various ionic and/or ionizable compounds with low sample and solvent consumption, there were many attempts to use it for the measurement of amino acids present in physiological fluids. As a rule, these methods require derivatization procedures for detection purposes. Here, we present two protocols for the analysis of free amino acids employing free zone capillary electrophoresis. Main advantage of both methods is an absence of any derivatization procedures that permits the analysis of free amino acid in physiological fluids. The method using direct detection and carrier electrolyte consisting of disodium monophosphate (10 mM at pH 2.90) permits determination of compounds that absorb in UV region (aromatic and sulfur containing amino acids, as well as some peptides, such as carnosine, reduced and oxidized glutathione). The other method uses indirect absorbance detection, employing 8 mM p-amino salicylic acid buffered with sodium carbonate at pH 10.2 as running electrolyte. It permits quantification of 30 underivatized physiological amino acids and peptides. In our experience, factorial design represents a useful tool for final optimization of the electrophoretic conditions if it is necessary.
T2  - Methods in Molecular Biology
T1  - Capillary electrophoresis of free amino acids in physiological fluids without derivatization employing direct or indirect absorbance detection
VL  - 828
SP  - 243
EP  - 254
DO  - 10.1007/978-1-61779-445-2_19
ER  - 

@article{
author = "Žunić, G.D and Spasić, S and Jelić-Ivanović, Zorana",
year = "2012",
abstract = "Whole blood and/or plasma amino acids are useful for monitoring whole body protein and amino acid metabolism in an organism under various physiological and pathophysiological conditions. Various methodological procedures are in use for their measurement in biological fluids. From the time when capillary electrophoresis was introduced as a technology offering rapid separation of various ionic and/or ionizable compounds with low sample and solvent consumption, there were many attempts to use it for the measurement of amino acids present in physiological fluids. As a rule, these methods require derivatization procedures for detection purposes. Here, we present two protocols for the analysis of free amino acids employing free zone capillary electrophoresis. Main advantage of both methods is an absence of any derivatization procedures that permits the analysis of free amino acid in physiological fluids. The method using direct detection and carrier electrolyte consisting of disodium monophosphate (10 mM at pH 2.90) permits determination of compounds that absorb in UV region (aromatic and sulfur containing amino acids, as well as some peptides, such as carnosine, reduced and oxidized glutathione). The other method uses indirect absorbance detection, employing 8 mM p-amino salicylic acid buffered with sodium carbonate at pH 10.2 as running electrolyte. It permits quantification of 30 underivatized physiological amino acids and peptides. In our experience, factorial design represents a useful tool for final optimization of the electrophoretic conditions if it is necessary.",
journal = "Methods in Molecular Biology",
title = "Capillary electrophoresis of free amino acids in physiological fluids without derivatization employing direct or indirect absorbance detection",
volume = "828",
pages = "243-254",
doi = "10.1007/978-1-61779-445-2_19"
}

Žunić, G.D, Spasić, S.,& Jelić-Ivanović, Z.. (2012). Capillary electrophoresis of free amino acids in physiological fluids without derivatization employing direct or indirect absorbance detection. in Methods in Molecular Biology, 828, 243-254.
https://doi.org/10.1007/978-1-61779-445-2_19

Žunić G, Spasić S, Jelić-Ivanović Z. Capillary electrophoresis of free amino acids in physiological fluids without derivatization employing direct or indirect absorbance detection. in Methods in Molecular Biology. 2012;828:243-254.
doi:10.1007/978-1-61779-445-2_19 .

Žunić, G.D, Spasić, S, Jelić-Ivanović, Zorana, "Capillary electrophoresis of free amino acids in physiological fluids without derivatization employing direct or indirect absorbance detection" in Methods in Molecular Biology, 828 (2012):243-254,
https://doi.org/10.1007/978-1-61779-445-2_19 . .