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Citation: LI Bai-Chuan, WANG Wei-Jie, XU Shu-Han, CHEN Xiao-Mei, CHEN Xi. A Non-enzymatic Photoelectrochemical Sensor for Rapid Detection of Ethanol in Alcohols[J]. Chinese Journal of Analytical Chemistry, ;2018, 46(8): 1208-1214. doi: 10.11895/j.issn.0253-3820.181167 shu

A Non-enzymatic Photoelectrochemical Sensor for Rapid Detection of Ethanol in Alcohols

1.
College of Food and Biological Engineering, Jimei University, Xiamen 361021, China;
2.
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China

Received Date: 16 March 2018
Revised Date: 20 June 2018

Fund Project: This work was supported by the National Natural Science Foundation of China (Nos.21675062, 21305050), and the Science and Technology Planning Project of Fujian Province, China (No. 2017J05024).

Non-enzymatic photoelectrochemical (PEC) method for the rapid detection of ethanol in alcoholic beverages was established by using vertical plate-like WO₃ arrays (VAP-WO₃) grown on the FTO surface. The morphology, elemental composition and lattice characteristics of VAP-WO₃ were characterized by SEM, EDX and XRD techniques, respectively. The results of PEC experiments showed that ethanol could significantly enhance the photocurrent of VAP-WO₃/FTO electrode. The effects of sodium tungstate amount, bias voltage, and pH values on the PEC properties of VAP-WO₃/FTO electrode in the detection of ethanol were investigated. Under optimized conditions, the linear equation for ethanol detection was ΔI=6.773+0.0494C_Ethanol (μg/mL), and the linear range was from 20.0 μg/mL to 160.0 μg/mL with a detection limit of 7.3 μg/mL. In addition, the VAP-WO₃/FTO electrode revealed good reusability and high selectivity in ethanol detection. The method was applied to the determination of ethanol in alcoholic beverages. The measured values were in good agreement with the labeling values of the alcohols, which was also consistent with the results obtained according to the corresponding national standard of China. The spiked recoveries of the sample were 93.9%-107.0%.
- Photoelectrochemistry,
- Tungsten oxide,
- Ethanol,
- Liquor
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