光散射学报, 2015, 27 (1): 69, 网络出版: 2015-09-08  

红外光谱结合化学计量学对朝天椒和涮涮辣的研究

Infrared Spectroscopy Combined with Chemometrics to Study Capsicum frutescens var and Shuanshuan Pepper
作者单位
云南师范大学物理与电子信息学院, 昆明 650500
摘要
本文利用红外光谱结合主成分(PCA)和偏最小二乘法判别分析(PLS-DA)研究了朝天椒(簇生椒)和涮涮辣.测试了2种辣椒60个样品的红外光谱,对光谱范围1800~950 cm-1做二阶导数处理,发现在该区间存在着明显的差异,利用该区间二阶导数光谱数据进行主成分分析和偏最小二乘法,结果表明PCA和PLS-DA都能很好的区别两种辣椒,其中主成分的正确率为100%,偏最小二乘法在隐含潜含变量为12个时其正确率最好,朝天椒的正确率为86.7%,涮涮辣的正确率为93.3%.结果表明小波变换结合PCA和PLS-DA用于傅里叶变换红外光谱技术中能够准确地识别朝天椒和涮涮辣,为区分不同品种的辣椒提供快速和有效的方法.
Abstract
Fourier transform infrared (FTIR)spectroscopy combined with principal component analysis (PCA)and partial least squares discriminant analysis (PLS-DA)were used to study Capsicum frutescens var and shuanshuan pepper.FTIR spectra of 60 samples of 2 species of Capsicum frutescens L were obtained,the results showed that the infrared spectra of Capsicum frutescens L were similar,but tiny differences in wave-numbers and absorption intensities of peaks were observed in the range of 1800~950 cm-1.PCA and PLS-DA were performed on the second derivative infrared spectra in this range.Results show that the PCA and PLS-DA can distinguish two kinds of chili peppers.PCA provides about 100% of classification accuracy,and PLS-DA yield 86.7% classification accuracy for Capsicum frutescens var and 93.3% for shuanshuan pepper.It is proved that FTIR spectroscopy combined with PCA and PLS-DA could be used to discriminate Capsicum frutescens var and shuanshuan pepper.

李伟星, 刘刚, 赵兴祥, 王小龙, 汪小华. 红外光谱结合化学计量学对朝天椒和涮涮辣的研究[J]. 光散射学报, 2015, 27(1): 69. LI Wei-xing, LIU Gang, ZHAO Xing-xiang, WANG Xiao-long, WANG Xiao-hua. Infrared Spectroscopy Combined with Chemometrics to Study Capsicum frutescens var and Shuanshuan Pepper[J]. The Journal of Light Scattering, 2015, 27(1): 69.

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!