scholarly journals Determination of free amino acids in tea by a novel method of reversed-phase high performance liquid chromatography applying 6-Aminoquinolyl-N-Hydroxysuccinimidyl carbamate reagent

2018 ◽  
Vol 55 (10) ◽  
pp. 4276-4286 ◽  
Author(s):  
Min Li ◽  
Daxiang Li ◽  
Yuling Tai ◽  
Chenchen Gu ◽  
Yasai Song ◽  
...  
Keyword(s):  
Amino Acids ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Free Amino Acids ◽  
Free Amino ◽  
High Performance ◽  
Reversed Phase ◽  
Novel Method

scholarly journals Determination ofβ-Cyano-L-alanine,γ-Glutamyl-β-cyano-L-alanine, and Common Free Amino Acids inVicia sativa(Fabaceae) Seeds by Reversed-Phase High-Performance Liquid Chromatography

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Cristina Megías ◽  
Isabel Cortés-Giraldo ◽  
Julio Girón-Calle ◽  
Javier Vioque ◽  
Manuel Alaiz
Keyword(s):  
Amino Acids ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Free Amino Acids ◽  
Free Amino ◽  
High Performance ◽  
Limit Of Detection ◽  
Reversed Phase ◽  
Diethyl Ethoxymethylenemalonate

A method for determination ofβ-cyano-L-alanine,γ-glutamyl-β-cyano-L-alanine and other free amino acids inVicia sativais presented. Seed extracts were derivatized by reaction with diethyl ethoxymethylenemalonate and analyzed by reverse-phase high-performance liquid chromatography. Calibration curves showed very good linearity of the response. The limit of detection and quantification was 0.15 and 0.50 μM, respectively. The method has high intra- (RSD = 0.28–0.31%) and interrepeatability (RSD = 2.76–3.08%) and remarkable accuracy with a 99% recovery in spiked samples. The method is very easy to carry out and allows for ready analysis of large number of samples using very basic HPLC equipment because the derivatized samples are very stable and have very good chromatographic properties. The method has been applied to the determination ofγ-glutamyl-β-cyano-L-alanine,β-cyano-L-alanine, and common free amino acids in eight wild populations ofV. sativafrom southwestern Spain.

scholarly journals Determination of free amino acids in burley tobacco by high performance liquid chromatography

2016 ◽  
Vol 23 (1) ◽  
pp. S64-S68 ◽  
Author(s):  
Yanqiu Jing ◽  
Baolin Zhang ◽  
Xiuxiu Yuan ◽  
Yuzhen Gao ◽  
Ping Lu ◽  
...  
Keyword(s):  
Amino Acids ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Free Amino Acids ◽  
Free Amino ◽  
High Performance ◽  
Burley Tobacco
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