Rapid Qualitative and Quantitative Determination of Trace Methanol in Baijiu by Gas-Phase Multi-Molecular Infrared Spectroscopy

1.0.2, 0.6, and 1.0 are the monitoring data used for the t-test, corresponding to methanol concentrations of 0.2 g/L, 0.6 g/L, and 1.0 g/L, respectively. These data were obtained by FTIR detection. All spectra were preprocessed by baseline correction, normalization, and smoothing to yield the final preprocessed data, and all subsequent data presented were treated in the same manner. The software used was PerkinElmer Spectrum IR 2.The files Fig1 and Fig2 contain the original figures and source data used in the manuscript, showing the gas-phase and liquid-phase detection results of methanol and ethanol, respectively.3.The folder MM-IR contains the raw data used for multi-molecular infrared spectroscopy. Samples labeled 1–8 correspond to methanol concentrations of 0.05, 0.2, 0.4, 0.6, 0.8, 1, 2, and 4 g/L, respectively.4.The model folder contains the data and code used for model construction, which were processed using MATLAB.5.The temperature and vol files contain infrared spectra acquired under different sample vaporization conditions.All figures involved in these files were plotted using Origin.