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基于近红外光谱的花椒麻味物质快速检测方法

Keywords: 近红外光谱分析,花椒,麻味物质,快速检测

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Abstract:

针对传统方法测定花椒麻味物质含量耗时、费工的缺点,提出了应用近红外光谱分析技术,快速检测花椒麻味物质含量的新方法.对于141份粉碎到40目的花椒粉末样品,首先使用基于主成分得分与遗传算法的近红外光谱建模样品选择方法(PCA-SSGA)进行样品选择,优选出80份样品.然后应用偏最小二乘法(PLS),将其中60份样品的近红外光谱建立校正模型,并对其余20份样品组成的预测集进行预测.结果显示,测定系数(R220)为0.9004,预测标准差(RMSEP20)为0.8130,预测相对标准差(RSD20)为6.07%,预测相对分析误差(RPD20)为3.1670.说明模型对预测集样品具有一定的预测能力,基于近红外光谱技术快速检测花椒麻味物质是可行的.

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