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| 中红外光谱法快速检测浓香型原酒中的酯类含量 |
| Rapid determination of ester content in nongxiangxing crude baijiu by mid-infrared spectroscopy |
| 投稿时间：2025-03-31 修订日期：2025-06-21 |
| DOI： |
| 中文关键词: 浓香型原酒 中红外光谱法 气相色谱法 定量检测 |
| 英文关键词:nongxiangxing crude baijiu mid-infrared spectroscopy gas chromatography quantitative detection |
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| 中文摘要: |
| 目的 通用中红外光谱法建立浓香型原酒中酯类含量的快速定量检测方法。方法 采用中红外光谱分析技术结合气相色谱法对浓香型原酒进行检测，并利用偏最小二乘法分别建立浓香型原酒中己酸乙酯、乙酸乙酯、乳酸乙酯、丁酸乙酯的中红外定量检测模型。结果 己酸乙酯、乙酸乙酯、乳酸乙酯检测模型线性关系R2大于0.99，均方根误差低于0.07 g/L，说明模型具有良好拟合度和稳定性。进行外部验证后的预测结果平均相对误差低于3.50%，说明模型具有良好的检测效果，预测值与真实值接近。丁酸乙酯由于其含量低，光谱范围窄，模型效果较差。结论 此方法对浓香型原酒中的己酸乙酯、乙酸乙酯、乳酸乙酯含量具有良好的检测能力，能够满足企业对日常生产原酒进行快速检测分析的基本需求，为白酒的快速检测、分析、定级等提供了新的发展方向。 |
| 英文摘要: |
| Objective A rapid quantitative detection method for ester content in nongxiangxing crude baijiu was established by using mid-infrared spectroscopy. Methods The mid-infrared spectroscopy analysis technology combined with gas chromatography was used to detect nongxiangxing crude baijiu. Partial least squares method was employed to establish mid-infrared quantitative detection models for ethyl hexanoate, ethyl acetate, ethyl lactate, and ethyl butyrate in nongxiangxing crude baijiu. Results The detection models for ethyl hexanoate, ethyl acetate, and ethyl lactate exhibit linear coefficients (R2) exceeding 0.99 and root mean square error below 0.07 g/L, indicating that the models had good goodness of fit and stability. The average relative error of the prediction results after external validation were lower than 3.50%, indicateing that the models had good detection performance and the predicted values were close to the true values. Due to its low content and narrow spectral range, the prediction effect of the model for ethyl butyrate was poor. Conclusion This methods had a good detection ability for the contents of ethyl hexanoate, ethyl acetate, and ethyl lactate in nongxiangxing crude baijiu. It could meet the basic needs of enterprises for the rapid detection and analysis of crude baijiu in daily production, providing a new development direction for the rapid detection, analysis, and grading of baijiu. |
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