阵列相关系数比对法在中药鉴别中的应用研究

中药材红外光谱具有“指纹”性，通过对红外特征吸收谱图的比对可达到区分和鉴别药材的目的。该研究用Visual Basic 6.0设计了中药材红外光谱阵列相关系数比对软件，建立了300多种中药药材的红外光谱数据库，将未知药材的红外光谱与数据库中药材的红外光谱进行比对，它能依11个波段两光谱相关系数的大小自动找到与库中最相似的光谱的药材，从而达到鉴别未知药材的目的。研究结果表明：在光谱数据库所包含的药材范围内，指定阵列相关系数的阈值，抓住特征波段光谱的比对，可避开CO₂和H₂O等外界因素对谱图的干扰，使比对结果准确可靠。该法有望成为中药材快速鉴别的一种常规手段。

Application of Comparison Method with Correlation Coefficient Array in Identification of Chinese Herbs

The infrared spectrum of Chinese herbs possesses the character similar to fingerprint. The purpose to identify Chinese herbs can be achieved by way of comparing these spectra. The software of comparing correlation coefficient array of FTIR spectra was designed in Visual Basic 6.0. It established an infrared spectrum database including more than 300 kinds of Chinese herbs. The FTIR spectra of unknown herb can be compared with those of Chinese herbs in the database, and this method can identify the suitable herbs according to the similar herbs in the database. The study shows that within the spectral database of herbs, the factors of spectral interference, such as H2O, CO2, etc. , can be avoided through assigning threshold values of correlation coefficients and comparing spectra with characteristic peak bands, and the comparison result is credible and correct. This method was expected to be a common method in identifying Chinese herbs.