2021
DOI: 10.1007/s42452-021-04849-1
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Capillary electrophoresis-UV analysis using silica-layer coated capillary for separation of seven phenolic acids and caffeine and its application to tea analysis

Abstract: This work presents an innovative silica-layer coated capillary with comparison study of the silica-layer coated capillary and the fused-silica capillary for the separation of seven phenolic acids viz. p-hydroxyphenylacetic acid (PHPA), p-coumaric acid (PCA), p-hydroxybenzoic acid (PHBA), caffeic acid (CFA), (3,4-dihydroxyphenyl)acetic acid (DHPA), gallic acid (GLA), and 2,3,4-trihydroxybenzoic acid (THBA), together with caffeine (CF), by capillary electro-chromatography (CEC) and micellar electrokinetic chroma… Show more

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Cited by 9 publications
(2 citation statements)
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“…Numerous analytical techniques exist for accurately measuring the concentration of gallic acid in diverse samples. These methods include high-performance liquid chromatography (HPLC)[8], gas chromatography (GC) [9], UV-visible spectrophotometry [10], capillary electrophoresis (CE) [11], liquid chromatography-mass spectrometry (LC-MS) [12], and various electrochemical approaches [13][14][15][16]. These methods have all been employed effectively for the determination of gallic acid levels.…”
Section: Introductionmentioning
confidence: 99%
“…Numerous analytical techniques exist for accurately measuring the concentration of gallic acid in diverse samples. These methods include high-performance liquid chromatography (HPLC)[8], gas chromatography (GC) [9], UV-visible spectrophotometry [10], capillary electrophoresis (CE) [11], liquid chromatography-mass spectrometry (LC-MS) [12], and various electrochemical approaches [13][14][15][16]. These methods have all been employed effectively for the determination of gallic acid levels.…”
Section: Introductionmentioning
confidence: 99%
“…De acuerdo con Hemwech et al 2021(103) y Fonseca et al 2001(104), los buffer empleados para el análisis de polifenoles suelen ser buffer borato (pH 9-11), a bajas concentraciones (20mM). Adicionalmente, estudios del grupo de investigación por Cualla 2020 (90) se ha utilizado un buffer constituido de TBS 10 mM + dodecilsulfato de sodio 50 mM+ Acetonitrilo al 5% pH= 9 para el análisis rápido de cafeína, que permitió un tiempo de migración para este compuesto menor a 1 minuto, método conocido como submit, inyectando la muestra desde el Outlet.…”
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