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Sensors 2014, 14(4), 7359-7373; doi:10.3390/s140407359
Article

Development of a Sweetness Sensor for Aspartame, a Positively Charged High-Potency Sweetener

1,* , 2
, 3
 and 2,4
Received: 12 March 2014; in revised form: 14 April 2014 / Accepted: 21 April 2014 / Published: 23 April 2014
(This article belongs to the Special Issue Biomimetic Receptors and Sensors)
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Abstract: Taste evaluation technology has been developed by several methods, such as sensory tests, electronic tongues and a taste sensor based on lipid/polymer membranes. In particular, the taste sensor can individually quantify five basic tastes without multivariate analysis. However, it has proven difficult to develop a sweetness sensor, because sweeteners are classified into three types according to the electric charges in an aqueous solution; that is, no charge, negative charge and positive charge. Using membrane potential measurements, the taste-sensing system needs three types of sensor membrane for each electric charge type of sweetener. Since the commercially available sweetness sensor was only intended for uncharged sweeteners, a sweetness sensor for positively charged high-potency sweeteners such as aspartame was developed in this study. Using a lipid and plasticizers, we fabricated various lipid/polymer membranes for the sweetness sensor to identify the suitable components of the sensor membranes. As a result, one of the developed sensors showed responses of more than 20 mV to 10 mM aspartame and less than 5 mV to any other taste. The responses of the sensor depended on the concentration of aspartame. These results suggested that the developed sweetness sensor had high sensitivity to and high selectivity for aspartame.
Keywords: taste sensor; high-potency sweetener; sweetness sensor; aspartame; lipid/polymer membrane taste sensor; high-potency sweetener; sweetness sensor; aspartame; lipid/polymer membrane
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Yasuura, M.; Tahara, Y.; Ikezaki, H.; Toko, K. Development of a Sweetness Sensor for Aspartame, a Positively Charged High-Potency Sweetener. Sensors 2014, 14, 7359-7373.

AMA Style

Yasuura M, Tahara Y, Ikezaki H, Toko K. Development of a Sweetness Sensor for Aspartame, a Positively Charged High-Potency Sweetener. Sensors. 2014; 14(4):7359-7373.

Chicago/Turabian Style

Yasuura, Masato; Tahara, Yusuke; Ikezaki, Hidekazu; Toko, Kiyoshi. 2014. "Development of a Sweetness Sensor for Aspartame, a Positively Charged High-Potency Sweetener." Sensors 14, no. 4: 7359-7373.



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