2007
DOI: 10.1002/elps.200600228
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Analysis of flavonoids by CE using capacitively coupled contactless conductivity detection

Abstract: A CE method employing capacitively coupled contactless conductivity (C(4)D) compared to indirect UV-detection was developed for the analysis of phytochemically relevant flavonoids, such as 6-hydroxyflavone, biochanin A, hesperetin and naringenin. To ensure fast separation at highest selectivity, sensitivity and peak symmetry, the pH value and the concentration of the running BGE had to be optimized regarding both co- and counter-EOF mode. Optimum conditions were found to be 1.0 and 5.0 mM chromate BGE (pH 9.50… Show more

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Cited by 24 publications
(14 citation statements)
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“…Electrochemical detection of isoflavones is very commonly used in connection with electromigration separation techniques [96,97]. Different constructions of electrochemical detectors have been recommended.…”
Section: Concluding Remarks and Outlookmentioning
confidence: 99%
“…Electrochemical detection of isoflavones is very commonly used in connection with electromigration separation techniques [96,97]. Different constructions of electrochemical detectors have been recommended.…”
Section: Concluding Remarks and Outlookmentioning
confidence: 99%
“…Nowadays, over 6500 flavonoids particularly when on-column optical detection is employed due have been identified. 1 Researches of flavonoids have been to the shorter detection pathlength. 26 Such a problem can be prompted by their potential pharmacological effects, such as alleviated when a non-optical detection method is employed, anticancer, 2,3 protection of the cardiovascular system, 4 sedative, 5 such as the often-used amperometric or conductometric detection anti-bacterial infection, 6 antiviral, 7 and the hormone action.…”
Section: Introductionmentioning
confidence: 99%
“…Moreover, a herbal conductivity detection (C 4 D). 1 The flavonoids were medicine is a mixture of many chemical components that are electrophoretically separated in 3.3 min with detection limits, usually responsible for the therapeutic effects; and the converted to molarity, ranging from 5.0 to 7.4 × 10 -7 M. interactions among these components make their relationship to Potential gradient detection (PGD) is a kind of conductivity the safety and efficacy much more complicated. 10 Therefore, detection that is operated under a direct current mode.…”
Section: Introductionmentioning
confidence: 99%
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“…21 The pH of the buffer not only controls the number of negatively charged silanol groups in the capillary, but also determines the degree of dissociation (pK a ) of the analytes. 22 Therefore, their mobilities depend on their pK a values and the pH of the running BGE. The resolution was optimal at pH 8.0 with 21.60 min for 3,5,7,3 0 ,4 0 -pentahydroxyflavanone (Fig.…”
mentioning
confidence: 99%