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基于近红外光谱技术的白酒原酒中关键成分的定量分析

Food and Fermentation Industries(2018)

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Abstract
采用间隔偏最小二乘法(interval partial least squares,iPLS)、组合间隔偏最小二乘法(synergy interval partial least squares,SiPLS)、遗传偏最小二乘法(genetic algorithms partial least squares,GA-PLS)、竞争性自适应重加权法(competitive adaptive reweighted sampling,CARS)优选波长,并结合偏最小二乘法(partial least squares,PLS)建立白酒原酒中乙酸乙酯和乳酸乙酯定量分析模型.结果表明,上述4种方法都对模型有一定的优化效果,其中遗传算法结合组合间隔偏最小二乘算法(genetic algorithms-synergy interval partial least squares,GA-SiPLS)优选波长的优化效果最为明显,乙酸乙酯和乳酸乙酯的决定系数(R2)分别达到了0.989 7和0.991 0,预测均方根误差(root mean square error of prediction,RMSEP)分别为0.085 4、0.143 4,相对分析误差(relation percent deviation,RPD)分别为8.5和8.6,提高了模型的稳定性和精准性.说明近红外光谱分析技术对于白酒原酒中乙酸乙酯和乳酸乙酯含量的检测具有科学的指导意义.
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