近红外相关光谱的多元散射校正处理研究  

Research on the Correlation Chart of Near Infrared Spectra by Using Multiple Scatter Correction Technique

作　　者：芦永军[1] 曲艳玲[1] 宋敏[1] 

机构地区：[1]大连民族学院光电子技术研究所,辽宁大连116600

出　　处：《光谱学与光谱分析》2007年第5期877-880,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(10405005);吉林省科技发展计划项目(20040324-2);辽宁省自然科学基金项目(001064);大连民族学院博士启动基金项目(20056207)资助

摘　　要：近红外相关光谱法可以揭示待测成分光谱吸光度数据与浓度数据之间的全光谱线性相关性,明确待测成分在近红外波段的特征吸收位置,为定标波长的优选提供了依据。但是该相关光谱法极易受到样品颗粒的散射影响而掩盖与待测成分相关的光谱信息。文章首先提出将原始近红外光谱数据进行散射校正处理后再参与相关运算得到散射校正相关光谱的思想,经过实验验证得到的散射校正相关光谱有效地降低了散射的影响,提高了相关光谱的信噪比,更加准确地表征了待测成分吸光度数据与浓度数据之间在近红外全光谱通道的线性相关性。Correlation spectroscopy can be used to describe the linear correlationship between the absorbance and concentration data in the whole spectra range and clearly figure out the characteristic peak position of the sample under test. Meantime, this chart plays an extremely important role in offering the precise information for choosing the optimal wavelength set during the calibration process. Multiple scatter correct （MSC） spectroscopy is a kind of multiple variable scatter correction technique, and can effectively remove the base shift and tilt phenomenon caused by MSC. As a result, the ratio of signal to noise is improved greatly. Based on this feature, the new idea of the MSC technique was introduced into the preceding data treatment for the creation of correlation chart, and through careful experiment this idea was proved to be correct and effective.

关 键 词：近红外 相关光谱 多元散射校正 

分 类 号：O433.1[机械工程—光学工程]