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- W2792692684 abstract "Abstract The construction of a cylindrical carbon fiber on-line detector is presented, featuring a novel way of sealing the carbon fiber microelectrode, the design of an interchangeable carbon fiber microelectrode-based flow cell and its interface with data-acquisition electronics. The two-electrode setup was used, where the regeneration of the carbon fiber working electrode surface between analyses was performed using an electrochemical procedure, typically −1/+1 V potential cycling. The detector was incorporated into the flow injection analysis manifold and the applicability of the developed sensing platform tested for monitoring a hexacyanoferrate (II/III) redox probe and the oxidizable compounds trolox (6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid), uric acid, and l -ascorbic acid, with dehydroascorbic acid as a negative control. Finally, the optimized procedure was utilized for the analysis of human blood serum reductive (antioxidant) capacity based on amperometric sensing and flow injection analysis at a flow rate of 10 μl/min. Amperometric responses for blood serum samples were evaluated for standard deviation, whose average value was estimated to be ±0.3 nA (n = 20). The electrolytic efficiency of the detector was on the order of % units, e.g. 2% for trolox. The flow cell geometry and application of carbon fiber electrodes resulted in the absence of dead volumes and passivation phenomena, in contrast to conventional high-surface-area electrochemical cells. We suppose that the complex technical solution presented here could find a broad range of applications in the on-line monitoring of other reducing low-molecular bioactives and of the redox properties of various body fluids or clinical samples." @default.
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- W2792692684 date "2018-04-01" @default.
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- W2792692684 title "Carbon fiber on-line detector for monitoring human blood serum reductive capacity. A complex technical solution" @default.
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- W2792692684 doi "https://doi.org/10.1016/j.jelechem.2018.02.037" @default.
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