JOURNAL OF FOOD COMPOSITION AND ANALYSIS
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2025
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IF 4.6
Wei Dai,Wenjun Tan,Xuepeng Chen,Jilei Wang,Yougui Yu,Qing Zheng
This study investigates the interconversion between acetaldehyde and its acetal derivatives during the aging process of Baijiu. Acetaldehyde imparts a pungent aroma, while acetal contributes soft fruity and sweet notes to Baijiu. The dynamic equilibrium between these two compounds, mediated by a reversible reaction, significantly influences the aromatic balance and overall flavor harmony of the liquor. By analyzing aging data from Baijiu samples of different alcohol contents (62°, 52°, and 38° ABV) and aromatic types ( Nong , Jiang , Feng , Jian ), we calculated the apparent equilibrium constant (K) and developed a model predicting the simplified equilibrium constant as a function of alcohol content. Results revealed that reduced alcohol content shifts the equilibrium toward acetaldehyde formation, diminishing acetal-derived aromas. This study pioneers a thermodynamic quantitative model for acetaldehyde-acetal interconversion in Baijiu, elucidates the regulatory role of alcohol content in reaction equilibrium through solvent effects. These findings contribute significantly to the scientific understanding of Baijiu aging and offer practical solutions for flavor optimization in Baijiu production, particularly for low-alcohol Baijiu.
研究领域:
食品化学
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风味科学
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物理化学
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热力学
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酿造技术
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2018
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IF 5.667
Wei Li,Xuerui Zhu,Xin Wang,Jie Liu,Baowen Liang,Tiesong Zheng,Jianlin Li
A new real-time monitoring method for alcohol content in spirit samples has been established on base of stable TiO 2 -coated porous silicon (PSi) interferometer. There is a linear relationship between the different alcohol contents in range of 10%–70% (v/v) and efficient optical thickness (EOT) or the reflection peak positions of the sensing film. The alcohol content of sample can be measured by the EOT or the reflection peak positions with the TiO 2 coated PSi interferometer. Both the straight TiO 2 -PSi and rugate TiO 2 -PSi can detect the alcohol contents, but the former displays a sensitivity of 2.911 nm ± 0.145/alcohol content unit (ACU) which is fifty times more sensitive than that of the latter. The developed method is a rapid, sensitive, on-line, and cost-efficient detection technique without sample pretreatment for alcohol content in spirit samples. The results detected by the developed method for alcohol content in nine spirit samples are agreement with that of traditional alcoholmeter method. The novel established method has a great potential in food industry, environment and health fields for monitoring alcohol content.
研究领域:
食品科学
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光学传感
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
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2014
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IF 5.825
Li Zhang,Hetong Qi,Yuexiang Wang,Lifen Yang,Ping Yu,Lanqun Mao
This study demonstrates a rapid visualization assay for on-spot sensing of alcohol content as well as for discriminating methanol-containing beverages with solvent stimuli-responsive supramolecular ionic material (SIM). The SIM is synthesized by ionic self-assembling of imidazolium-based dication C10(mim)2 and dianionic 2,2′-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) in water and shows water stability, a solvent stimuli-responsive property, and adaptive encapsulation capability. The rationale for the visualization assay demonstrated here is based on the combined utilization of the unique properties of SIM, including its water stability, ethanol stimuli-responsive feature, and adaptive encapsulation capability toward optically active rhodamine 6G (Rh6G); the addition of ethanol into a stable aqueous dispersion of Rh6G-encapsulated SIM (Rh6G-SIM) destructs the Rh6G-SIM structure, resulting in the release of Rh6G from SIM into the solvent. Alcohol content can thus be visualized with the naked eyes through the color change of the dispersion caused by the addition of ethanol. Alcohol content can also be quantified by measuring the fluorescence line of Rh6G released from Rh6G-SIM on a thin-layer chromatography (TLC) plate in response to alcoholic beverages. By fixing the diffusion distance of the mobile phase, the fluorescence line of Rh6G shows a linear relationship with alcohol content (vol %) within a concentration range from 15% to 40%. We utilized this visualization assay for on-spot visualizing of the alcohol contents of three Chinese commercial spirits and discriminating methanol-containing counterfeit beverages. We found that addition of a trace amount of methanol leads to a large increase of the length of Rh6G on TLC plates, which provides a method to identify methanol adulterated beverages with labeled ethanol content. This study provides a simple yet effective assay for alcohol content sensing and methanol differentiation.
研究领域:
化学
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分析化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2023
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IF 8.4
Chenzhao Wang,Junxian Li,Xiujuan Wang,Zhenjie Zhao,Runxiang Yao,Yuhao Jiang,Shanshan Wei,Zhibing Wang,Guoying Sun
A three-mode fluorescence sensing platform using reusable red emission carbon dots (R-CDs) as a fluorescent sensor was developed for rapid and highly sensitive detection of alcohol content in alcoholic beverages. The R-CDs prepared using ionic liquids as precursors exhibited excellent dispersion and red fluorescence characteristics in ethanol. Moreover, the fluorescence could be quenched due to their aggregation in water. Based on the aggregation-caused quenching (ACQ) mechanism, a new fluorescence assay for the detection of alcohol content was established with a limit of detection as low as 0.12 %. This sensing platform possessed the advantages of low cost, portability, and simplicity of operation, and laid a further foundation for the on-site detection application of R-CDs in the field of sensing.
研究领域:
分析化学
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材料科学
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环境监测
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）