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植物学报  2014 

基于近红外漫反射光谱快速测定淫羊藿蛋白质含量

DOI: 10.3724/SP.J.1259.2014.00611, PP. 611-617

Keywords: 近红外漫反射光谱,蛋白质,淫羊藿,快速定量分析,定标方程

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Abstract:

?采用近红外漫反射光谱技术对淫羊藿(Epimedium)的蛋白质含量进行快速且无损检测。近红外漫反射光谱经二阶导数处理、标准多元离散校正及主成分分析聚类处理后,采用改进最小二乘法回归得到的定标模型预测效果最佳,定标决定系数、交互验证标准差及交互验证相关系数分别为0.923、0.554和0.717。近红外光谱分析法的测定结果与用凯氏定氮法所得结果无显著差异,两种方法测定值的相关性较高(R2=0.9339)。重复性实验表明,近红外光谱分析法的相对标准偏差为0.937%。该研究首次采用近红外光谱分析法测定了8种淫羊藿的蛋白质含量。该方法简便、精确,在淫羊藿资源开发利用和药材质量控制方面具有参考意义。

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