Wu Yun, Wang Meiqi, Gu Ying, Ge Kun
College of Food Science and Pharmacy, Xinjiang Agricultural University, Urumqi 830052, China.
Faculty of Food Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China.
Food Chem X. 2024 Dec 12;25:102091. doi: 10.1016/j.fochx.2024.102091. eCollection 2025 Jan.
Herein, the miniaturized thermal purge-and-trap (MTPT) device combined with self-calibration colorimetric/surface-enhanced Raman spectroscopy (SERS) dual-model optical sensors were designed for effective analysis of sulfur dioxide (SO) in wine. The SO can be rapidly separated from wine and enriched by MTPT device, ensuring colorimetric/SERS dual-model optical sensing based on Karl Fischer reaction. The high separation efficiency of miniaturized MTPT device combined with self-calibration of dual-model optical sensors significantly alleviate matrix interference and improve the detection accuracy. The satisfactory linear range of 0.1-200.0 mg/L and 0.1-500.0 mg/L with limit of detection of 0.03 mg/L can be obtained. Finally, the MTPT-colorimetric/SERS method was applied to determine the content of SO in different kinds of wine to verify the practicality. These results provide an ideal strategy in construction of MTPT device combined with self-calibration dual-model optical sensors for quantification of gaseous hazards in complex food samples with high rapidity, anti-interference and accuracy.
在此，设计了一种与自校准比色/表面增强拉曼光谱（SERS）双模式光学传感器相结合的小型热吹扫捕集（MTPT）装置，用于有效分析葡萄酒中的二氧化硫（SO₂）。SO₂可通过MTPT装置从葡萄酒中快速分离并富集，确保基于卡尔费休反应的比色/SERS双模式光学传感。小型MTPT装置的高分离效率与双模式光学传感器的自校准相结合，显著减轻了基质干扰并提高了检测准确性。可获得令人满意的线性范围，分别为0.1 - 200.0 mg/L和0.1 - 500.0 mg/L，检测限为0.03 mg/L。最后，将MTPT - 比色/SERS方法应用于测定不同种类葡萄酒中SO₂的含量以验证其实用性。这些结果为构建结合自校准双模式光学传感器的MTPT装置提供了一种理想策略，可用于快速、抗干扰且准确地定量复杂食品样品中的气态有害物质。
