Chen Jian, Cao Xiaoyu, Liu Wei, Liu Jianghua, Qi Liang, Wei Minmin, Zou Xuan
School of Food Science and Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China.
School of Biological and Pharmaceutical Sciences, Shaanxi University of Science and Technology, Xi'an 710021, China.
Foods. 2024 Sep 26;13(19):3064. doi: 10.3390/foods13193064.
Furfural is an essential compound that contributes to the distinctive flavor of sauce-flavored Baijiu. However, traditional detection methods are hindered by lengthy and complex sample preparation procedures, as well as the need for expensive equipment. Therefore, there is an urgent need for a new approach that allows rapid detection. In this study, we developed a novel surface-enhanced Raman spectroscopy (SERS) substrate by constructing MXene (TiCT) @Ag nanoparticles (Ag NPs) through an electrostatic attraction method. The MXene (TiCT) @Ag NPs were successfully fabricated, with adsorbed NaCl-treated Ag NPs uniformly absorbed on the surface of MXene (TiCT), creating high-density distributed SERS "hot spots". The prepared substrate demonstrated excellent sensitivity, uniformity, repeatability, and long-term stability, with a low detectable concentration of 10 M for R6G (Rhodamine 6G) and an enhancement factor of up to 7.08 × 10. When applied for the in situ SERS detection of furfural in Baijiu, the detection limit was as low as 0.5 mg/L. Overall, the proposed method offers rapid, low-cost, and sensitive quantitative analysis, which is significant not only for detecting furfural in Baijiu but also for identifying hazardous substances and distinguishing between authentic and counterfeit Baijiu products.
糠醛是一种对酱香型白酒独特风味有贡献的重要化合物。然而，传统检测方法受到冗长复杂的样品制备程序以及对昂贵设备需求的阻碍。因此，迫切需要一种能够实现快速检测的新方法。在本研究中，我们通过静电吸引法构建了MXene（TiCT）@Ag纳米颗粒（Ag NPs），开发了一种新型表面增强拉曼光谱（SERS）基底。成功制备了MXene（TiCT）@Ag NPs，经NaCl处理的吸附Ag NPs均匀吸附在MXene（TiCT）表面，形成高密度分布的SERS“热点”。所制备的基底表现出优异的灵敏度、均匀性、重复性和长期稳定性，对罗丹明6G（R6G）的最低可检测浓度为10 M，增强因子高达7.08×10。将其应用于白酒中糠醛的原位SERS检测时，检测限低至0.5 mg/L。总体而言，所提出的方法提供了快速、低成本且灵敏的定量分析，这不仅对白酒中糠醛的检测具有重要意义，而且对识别有害物质以及区分白酒正品和假冒产品也具有重要意义。
