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A carbon paste electrode modified with multiwall carbon nanotubes and copper(I) oxide (MWCNT–Cu 2 O CPME) was fabricated, and the electrochemical behaviors of 19 kinds of natural amino acids at this modified electrode were studied. The experimental results showed that the various kinds of amino acids without any derivatization displayed obvious oxidation current responses at the modified electrode...
This article describes an effective microchip capillary-electrophoresis protocol for rapid and effective measurements of food-related seleno amino acids, including Se-methionine (Se-Met), Se-ethionine (Se-Eth), Se-methyl cysteine (Se-Cys), utilizing o-phtaldialdeyde/2-mercaptoethanol (OPA/2-ME) derivatization. Relevant parameters of the chip separation and amperometric detection are examined and optimized...
A method based on microchip capillary electrophoresis with amperometric detection was developed for the rapid separation and direct detection of oxidizable aromatic amino acids (without prior derivatization). The working electrode was a thick-film carbon strip electrode positioned opposite the outlet of the separation channel. Factors influencing the separation and detection processes were examined...
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