相关检测技术在近红外光谱分析中的应用

运用信号分析的理论，研究了把相关检测技术应用于近红外光谱分析的方法。通过作药品甲硝唑纯品光谱及混合品光谱的相关函数值，并对相关曲线进行分析，结果表明通过相关处理，光谱信息得到了分离和增强，可以作为一种光谱信息特征提取的有效方法，用于定性和定量分析，对解决近红外光谱检测中光谱叠加、信息率低的难题提供了一种新的思路和探索。

The Application of Correlation Detection to Near-Infrared Spectroscopy

Correlation detection was applied to near-infrared spectroscopy (NIRS) to extract the signal feature in the present paper. With metronidazole tablets as the object, the correlation both between each pure components and between pure metronidazole and different component-content mixtures were obtained. The results show that through correlation processing, the information feature of spectra could be separated and strengthened, and so better fitted to realize qualitative and quantitative spectrochemical analysis. Besides, the impact of noise could be lowered in this process. The conclusion is that correlation detection is an effective way to extract feature information and can be considered as a new solution to the problems of spectral superposition and low information rate in NIRS.