Department of Chemistry, Faculty of Engineering, Rajamangala University of Technology, Isan, Khon Kaen Campus, Khon Kaen 40000, Thailand.
Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand.
Food Chem. 2018 Jul 1;253:300-304. doi: 10.1016/j.foodchem.2018.01.168. Epub 2018 Jan 31.
An alternative approach using visible chemical waves for ethanol determination is presented. The method is based on the dynamic change of chemical waves in the Belousov-Zhabotinsky (BZ) reaction by perturbation with ethanol. The observablepropagating waves, generatedina Petri dish, can be recorded by using a smartphone camera. The propagating distances are measured from photographic images and then plotted as a function of time to attain the wave velocity. It is found that wave velocities are inversely proportional to ethanol concentrations. By using this linear relationship, the ethanol content can be efficiently quantified with good intra-day and inter-day precision (<3% RSD). Validated by the GC technique, the developed method is highly reliable and successfully applied for quantifying the ethanol content in beer, colored whisky, and vodka samples. Hence, this new method provides an alternative practical strategy for simple quantitative detection of ethanol without the need for instruments.
本文提出了一种利用可见化学波测定乙醇的新方法。该方法基于乙醇对 Belousov-Zhabotinsky（BZ）反应中化学波的动态变化进行干扰。在培养皿中产生的可观察到的传播波可以使用智能手机摄像头进行记录。从照片中测量传播距离，然后将其绘制为时间的函数以获得波速。结果发现，波速与乙醇浓度成反比。通过使用这种线性关系，可以有效地定量乙醇含量，日内和日间精密度良好（<3%RSD）。通过 GC 技术验证，该方法具有高度可靠性，成功应用于啤酒、彩色威士忌和伏特加样品中乙醇含量的定量。因此，该新方法为无需仪器的简单定量检测乙醇提供了一种替代的实用策略。
