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• W2088006947 abstract "A biosensor design involving coimmobilization of fructose dehydrogenase (FDH) and inulinase (INU) on a gold nanoparticle–cysteamine (Cyst) self-assembled monolayer (SAM)-modified gold electrode (Aucoll–Cyst–AuE), for the determination of the carbohydrate inulin in foodstuffs, is reported. Tetrathiafulvalene (TTF), used as the mediator, was also coimmobilized by crosslinking with glutaraldehyde. INU catalyzes the hydrolysis of inulin, forming fructose that is detected through the fructose dehydrogenase system by the electrochemical oxidation of TTF at the bioelectrode. The variables involved in the preparation and performance of both the single enzyme FDH biosensor and the bienzyme inulin biosensor were optimized. The FDH–Aucoll–Cyst–AuE biosensor exhibited rapid and sensitive response to fructose, allowing the obtention of improved analytical characteristics for the determination of fructose with respect to other FDH electrochemical biosensors. Moreover, the lifetime of this biosensor was 35 days. The bienzyme INU/FDH–Aucoll–Cyst–AuE biosensor provided a calibration plot for inulin in the (5–100) × 10−6 M linear range, with a detection limit of 6.6 × 10−7 mol L−1. One single bienzyme biosensor responded within the control limits, set at ±3× the standard deviation of the currents measured on the first day of use, for more than 5 months. Furthermore, the biosensor exhibited high selectivity with respect to other carbohydrates. The usefulness of the biosensor was evaluated by the rapid determination of inulin in food products involving minimization of the fructose interference." @default.
• W2088006947 created "2016-06-24" @default.
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• W2088006947 date "2008-04-01" @default.
• W2088006947 modified "2023-10-17" @default.
• W2088006947 title "Bienzyme amperometric biosensor using gold nanoparticle-modified electrodes for the determination of inulin in foods" @default.
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• W2088006947 doi "https://doi.org/10.1016/j.ab.2007.12.020" @default.
• W2088006947 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/18201543" @default.
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