Capillary electrophoresis mass spectrometry with sheathless electrospray ionization for high sensitivity analysis of underivatized amino acids

2012 ◽  
Vol 33 (14) ◽  
pp. 2112-2121 ◽  
Author(s):  
Ji-Seon Jeong ◽  
Sook-Kyung Kim ◽  
Sang-Ryoul Park
Keyword(s):  
Mass Spectrometry ◽  
Amino Acids ◽  
Sensitivity Analysis ◽  
Capillary Electrophoresis ◽  
Electrospray Ionization ◽  
High Sensitivity ◽  
Underivatized Amino Acids ◽  
Capillary Electrophoresis Mass Spectrometry

scholarly journals High-throughput and high-sensitivity capillary electrophoresis–mass spectrometry method for sulfur-containing amino acids

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Jieyu Zhao ◽  
Bing Dong ◽  
Yanni Zhao ◽  
Jun Yang ◽  
Pei Pei ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Amino Acids ◽  
Capillary Electrophoresis ◽  
Sulfur Metabolism ◽  
High Sensitivity ◽  
Detection Range ◽  
Experimental Optimization ◽  
Sample Preconcentration ◽  
Relative Standard ◽  
Capillary Electrophoresis Mass Spectrometry

AbstractBiological thiol amino acids have been suggested as biomarkers for pathological changes because they are reactive chemicals that participate in various physiological processes. In this study, multisegmented injection capillary electrophoresis–mass spectrometry with online sample preconcentration was used for analysis of thiol amino acids and intermediates of sulfur metabolism in human glioma cell line U-251 with high accuracy, throughput, and sensitivity. This was achieved using multiple, large-volume injections for online sample preconcentration. The 16 intermediates of sulfur metabolism had a good linear correlation coefficient range of 0.984–1 and the limit of detection range was 1.4–203.9 ng/mL. The recovery ranges of most amino acids were 88.1–114.5%, 89.0–104.3%, and 76.9–104.5% at 0.3, 0.75, and 1.5 μg/mL, respectively. The relative standard deviation ranges for the inter- and intra-day precision were 1.8–10.7% and 4.3–18.8%, respectively. Compared with the traditional injection method, the analytical time for compounds in sulfur metabolism was reduced to 4 min/sample, the method throughput was enhanced five times, and the sensitivity was increased 14.4–33.1 times. Customized injection sequences were applied in experimental optimization. The developed method simplified the experimental optimization to one injection and is suitable for the analysis of sulfur metabolites in biological samples and has high sensitivity, throughput, speed, and accuracy.

Capillary electrophoresis-mass spectrometry of derivatized amino acids for targeted neurometabolomics – pH mediated reversal of diastereomer migration order

2018 ◽  
Vol 1564 ◽  
pp. 199-206 ◽  
Author(s):  
Radu-Cristian Moldovan ◽  
Ede Bodoki ◽  
Anne-Catherine Servais ◽  
Bezhan Chankvetadze ◽  
Jacques Crommen ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Amino Acids ◽  
Capillary Electrophoresis ◽  
Capillary Electrophoresis Mass Spectrometry
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