Tian Wenxia, Liu Xiaofang, Zheng Jia, Ma Yi, Luo Huibo, Luo Xiaogang, Hou Changjun, Huo Danqun
Liquor Making Biology Technology and Application of Key Laboratory of Sichuan Province, College of Bioengineering, Sichuan University of Science and Engineering, 188 University Town, Yibin 644000, PR China.
Key Laboratory for Biorheological Science and Technology of Ministry of Education, Bioengineering College of Chongqing University, Chongqing 400044, PR China.
Food Chem. 2023 Aug 15;417:135888. doi: 10.1016/j.foodchem.2023.135888. Epub 2023 Mar 10.
Quickly discriminating different segmented Baijiu can directly control its grade and indirectly affect the quality of the finished Baijiu. A fluorescence sensor array was constructed based on PEI-terminated silver nanoparticles and lanthanide metal ions (PEI@Ag NPs@Ln). Ag NPs were stably dispersed in the PEI-woven network, initially accompanied by excellent fluorescence signals. Organic molecules disrupted the PEI structure and dragged the Ag NPs out. The free Ag NPs sintered or aggregated with the diffusion, resulting in fluorescence quenching. The three lanthanide ions speed up the process, allowing different organic molecules to exhibit more distinct signals. Thus, this sensor was used to map 11 organic molecules' fingerprints and to discriminate segmented Baijiu. The whole process takes only 2 min. With the assistance of pattern recognition, segmented Baijiu from three cellars were successfully discriminated. Fast, effective and simple are highlights, which opens up its practical application potential in the detection field.
快速区分不同分段的白酒能够直接控制其等级，并间接影响成品白酒的质量。基于聚醚酰亚胺封端的银纳米颗粒和镧系金属离子（PEI@Ag NPs@Ln）构建了一种荧光传感器阵列。银纳米颗粒稳定地分散在聚醚酰亚胺编织网络中，最初伴随着优异的荧光信号。有机分子破坏了聚醚酰亚胺结构，并将银纳米颗粒拖出。游离的银纳米颗粒随着扩散而烧结或聚集，导致荧光猝灭。三种镧系离子加速了这一过程，使不同的有机分子表现出更明显的信号。因此，该传感器用于绘制11种有机分子的指纹图谱并区分分段白酒。整个过程仅需2分钟。在模式识别的辅助下，成功区分了来自三个酒窖的分段白酒。快速、有效和简单是其亮点，这为其在检测领域的实际应用潜力开辟了道路。
