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Carbon-based screen-printed electrodes are suitable for uric acid detection. Xanthine oxidase (XO) was immobilized either directly on the surface of the electrode or in a reactor with CPG aminopropylsilane in a FIA assembly. Higher reproducibility and lifetime was obtained with the reactor. Optimum conditions were found for the determination of Hypoxanthine (Hx), Inosine (HxR) and Inosine monophosphate...
A simple and rapid procedure for the determination of fish freshness was developed and applied to the determination of the K 1 parameter (freshness indicator): K 1 = ([HXR] +[HX]) + [HXR] + [HX]) 100, where [IMP], [HXR] and [HX] are inosine monophosphate, inosine and hypoxanthine concentrations, respectively. A platinum electrode is used to detect hydrogen peroxide produced by...
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