State Key Laboratory of Precision Spectroscopy, East China Normal University, No.500, Dongchuan Rd, Shanghai 200241, China.
State Key Laboratory of Estuarine and Coastal Research, East China Normal University, No.500, Dongchuan Rd, Shanghai 200241, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2023 Jan 5;284:121787. doi: 10.1016/j.saa.2022.121787. Epub 2022 Sep 5.
Baijiu occupies a vital position in Chinese food and China's market. Strict evaluation of Baijiu is highly demanded. In this study, we constructed a novel fluorescent sensor array based on the single glutathione-protected gold nanoclusters (AuNCs) probe for the detection of organic acids and Baijiu. The fluorescence of AuNCs was simply modulated by three metal ions (Cu, Mn, and Ag), and formed new complexes as sensing elements. These four sensing elements responded variously to nine organic acids, and further chemometric analysis results allowed for the classification and quantification of acids. Moreover, the sensor array successfully identified 21 Baijiu samples of different brands among 11 aroma types. It could also distinguish Baijiu of different qualities as well as pure Baijiu from its adulterations and showed high selectivity among multiple interfering drinks. The results demonstrated that the AuNCs-based sensor array has considerable potential for quality monitoring of Baijiu.
白酒在中国食品和市场中占有重要地位。对白酒进行严格的评价是非常有必要的。在本研究中，我们构建了一种基于单一谷胱甘肽保护的金纳米簇(AuNCs)探针的新型荧光传感器阵列，用于检测有机酸和白酒。AuNCs 的荧光通过三种金属离子(Cu、Mn 和 Ag)简单地调节，并形成新的配合物作为传感元件。这四个传感元件对 9 种有机酸有不同的响应，进一步的化学计量学分析结果允许对酸进行分类和定量。此外，该传感器阵列成功地识别了 11 种香型中的 21 种不同品牌的白酒。它还可以区分不同质量的白酒，以及白酒与掺杂物的区别，并且在多种干扰饮料中表现出很高的选择性。结果表明，基于 AuNCs 的传感器阵列在白酒质量监测方面具有很大的潜力。
