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- W2103181767 abstract "A microchip capillary electrophoresis with amperometric detection, μCE-EC, for the analysis of phenolic acids is described. The problem of noise-laden signal under high electric field was tackled by adopting the end-channel design of electrode configuration: more specifically with the end-wrapped electrode configuration. At full stretch of effort, a finely tuned electrode could bring the detection limit well below micro molars for dopamine. At the end of the 10-cm serpentine micro-channel, a Pt electrode biased at +0.9 V (vs. Ag/AgCl) served as the working electrode. Injection of gentisic acid, protocatechuic acid, vanillic acid, p-coumaric acid, caffeic acid, ferulic acid, sinapic acid and chlorogenic acid gave repeatable results: the migration time deviating within 3.80% (n = 7) and peak current between 1.45 and 4.50%. Under the optimized conditions, the detection limits for phenolic acids could be brought down to the range between 1.82 μM and 19.85 μM at S/N = 3. The regression coefficient of the calibration curve over the range between 10 and 800 μM was better than 0.995. The merits of increased efficiency with serpentine channel and improved sensitivity with end-wrapped electrode are promising. Beer samples were tested for feasibility as a routine tool." @default.
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- W2103181767 date "2010-06-01" @default.
- W2103181767 modified "2023-09-24" @default.
- W2103181767 title "Fast Analysis of Phenolic Acids by Microchip Capillary Electrophoresis with Serpentine Channel and End Wrapped Electrode" @default.
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- W2103181767 doi "https://doi.org/10.1002/jccs.201000055" @default.
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