Authenticity identification of high – Temperature Daqu Baijiu through multi-channel visual array sensor of organic dyes combined with smart phone App

• Published in: Food chemistry 2024-04, Vol.438, p.137980-137980, Article 137980
• Main Authors: Zhu, Yanmei, Xiang, Fushuang, Su, Yuanyuan, Jiang, Xue, Cang, Yipeng, Long, Wanjun, Lan, Wei, Deng, Gaoqiong, Chen, Hengye, She, Yuanbin, Fu, Haiyan
• Format: Article
• Language: English
• Subjects: adulterated products; Authenticity identification; color; Color-changing organic dyes; DD-SIMCA; flavor; food chemistry; High - temperature Daqu Baijiu; mobile telephones; odors; pyrazines; quantum mechanics; temperature; Visual array sensor
• ISSN: 0308-8146; 1873-7072
• DOI: 10.1016/j.foodchem.2023.137980

[Display omitted] •Four-channel visual array sensor combined with DD-SIMCA for Baijiu identification.•Mechanism involves Zn2+ competition coordination between Baijiu and organic dyes.•Sensor arrays have 100 % identification accuracy, surpassing single sensors.•The accuracy of the smart phone combined with the array sensor can reach 93 %.•Ester, acid, alcohol, aldoketone, pyrazine play a major role in the identification. High - temperature Daqu Baijiu faces a challenge from illegal adulteration of high-grade Baijiu bottles with low-grade Baijiu, affecting its quality and value. This study developed a rapid identification method for high temperature Daqu Baijiu with the same aroma type using a four-channel visual array sensor and detection of color changes caused by competition coordination with Zn2+ and color-changing organic dyes. The array sensor demonstrated high stability and repeatability in targeting flavor components and achieved 97.78 % or more accuracy combined with DD-SIMCA model in detecting adulteration across the Baijiu with same aroma type. The results of GC–MS and Quantum Chemical Calculation showed that esters, acids, and pyrazines played a crucial role. The smart phone App could quickly identify the authenticity of Baijiu with accuracy achieved 93 %. This research provides a foundation for rapid and reliable assessment of Baijiu quality and authenticity, enabling the industry to combat fraudulent practices effectively.