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- W2945641111 abstract "A simple and rapid impedimetric sensor applicable for industrial lipase activity quantification was developed and characterized. It is based on the lipase catalyzed degradation by hydrolysis of a thin nanocomposite substrate sensitive layer deposited on a PCB stick electrode usable as disposable or regenerable. The sensitive layer degradation rate was evaluated by the impedance changes registration along time resulting from its thickness diminution applying a small amplitude AC voltage with a constant frequency. The AC current phase shift variations along the time caused by the impedance changes were registered as s sensor response. The sensor was characterized in terms of linear quantification range, LOD, precision and quantification time. The response time was found to be from 80 to 6 s for the linear concentration range from 0.99x10-2 to 1.68 U.S.P. U mL-1 with relative errors from 3.75% to 1.24% respectively and a LOD of 8x10-3 U.S.P. U mL-1. Finally, lipase spiked whey samples taken from milk industry were quantified and the results were validated by a titrimetric method revealing a good agreement (relative error less than 4.5%)" @default.
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- W2945641111 date "2019-10-01" @default.
- W2945641111 modified "2023-09-24" @default.
- W2945641111 title "Simple impedimetric sensor for rapid lipase activity quantification" @default.
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- W2945641111 doi "https://doi.org/10.1016/j.talanta.2019.05.059" @default.
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