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Sensors 2018, 18(9), 2758; https://doi.org/10.3390/s18092758

A Broad-Spectrum Sweet Taste Sensor Based on Ni(OH)2/Ni Electrode

School of Food Science and Biotechnology, Zhejiang Gongshang University, Zhejiang 310018, China
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Received: 9 July 2018 / Revised: 13 August 2018 / Accepted: 15 August 2018 / Published: 22 August 2018
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Abstract

A broad-spectrum sweet taste sensor based on Ni(OH)2/Ni electrode was fabricated by the cyclic voltammetry technique. This sensor can be directly used to detect natural sweet substances in 0.1 M NaOH solution by chronoamperometry method. The current value measured by the sensor shows a linear relationship with the concentration of glucose, sucrose, fructose, maltose, lactose, xylitol, sorbitol, and erythritol (R2 = 0.998, 0.983, 0.999, 0.989, 0.985, 0.990, 0.991, and 0.985, respectively). Moreover, the characteristic value of this sensor is well correlated with the concentration and relative sweetness of eight sweet substances. The good correlation between the characteristic value of six fruit samples measured by the sensor and human sensory sweetness measured by sensory evaluation (correlation coefficient = 0.95) indicates that it can reflect the sweetness of fruits containing several sweet substances. In addition, the sensor also exhibits good long-term stability over 40 days (signal ratio fluctuation ranges from 91.5% to 116.2%). Thus, this broad-spectrum sensor is promising for sweet taste sensory application. View Full-Text
Keywords: taste sensor; Ni(OH)2/Ni; characteristic value; sweet substances; sweetness taste sensor; Ni(OH)2/Ni; characteristic value; sweet substances; sweetness
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Mao, Y.; Tian, S.; Gong, S.; Qin, Y.; Han, J.; Deng, S. A Broad-Spectrum Sweet Taste Sensor Based on Ni(OH)2/Ni Electrode. Sensors 2018, 18, 2758.

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