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当前位置: 首页 > 文章 > 淀粉的红外光谱及其二维相关红外光谱的分析鉴定 中国农学通报 2015,31 (17) 58-64
Position: Home > Articles > Starch Discrimination with Fourier Transform Infrared Spectroscopy(FTIR) and Two-dimensional Correlation Infrared Spectroscopy(2D-IR) Chinese Agricultural Science Bulletin 2015,31 (17) 58-64

淀粉的红外光谱及其二维相关红外光谱的分析鉴定

作  者：
任静;刘刚;欧全宏;赵帅群;徐娟;马殿旭
单  位：
云南师范大学物理与电子信息学院
关键词：
淀粉;傅里叶变换红外光谱(FTIR);FTIR去卷积光谱;二维相关红外光谱
摘  要：
旨在采用傅里叶变换红外光谱(FTIR)、去卷积光谱、二阶导数光谱以及二维相关红外光谱,区分鉴别3种淀粉样品。对原始光谱1200~900 cm-1波数段进行傅里叶去卷积处理,计算能反映淀粉分子有序程度的1050/1020 cm-1峰强度比值;对其指纹区(1700~800 cm-1)做二阶导数处理。结果红外光谱显示3种淀粉原始光谱吸收峰非常相似,仅在吸收峰强度和峰位上有微小差异。发现3种淀粉颗粒有序结构的相对含量由多到少排序依次为莲藕淀粉、马铃薯淀粉、红薯淀粉。另外,3种淀粉样品在1607~1487 cm-1波数段以及1468、1187、1055、931 cm-1波数处二阶导数谱差异明显。并且,由3种淀粉样品的2D-IR光谱得知:在1150~1500 cm-1以及860~1200 cm-1波段内,不同淀粉光谱自动峰位置和强度显著不同。应用红外光谱、去卷积光谱、二阶导数光谱以及二维相关红外光谱技术不仅可以提供淀粉的分子振动信息,还可以对不同的淀粉进行很好的区分。因此红外光谱法对于分类鉴别不同种类的淀粉是一种快速、准确、有效的方法。
译  名：
Starch Discrimination with Fourier Transform Infrared Spectroscopy(FTIR) and Two-dimensional Correlation Infrared Spectroscopy(2D-IR)
作  者：
Ren Jing;Liu Gang;Ou Quanhong;Zhao Shuaiqun;Xu Juan;Ma Dianxu;School of Physics and Electronic Information,Yunnan Normal University;
关键词：
starch;;FTIR;;FTIR deconvolution infrared spectroscopy;;2D-IR
摘  要：
The objective of the present study was to discriminate three kinds of starch by fourier transforminfrared spectroscopy(FTIR),deconvolution infrared spectroscopy,second derivative infrared spectroscopy andtwo-dimensional correlation infrared spectroscopy(2D-IR).The FTIR spectra of starch in the region of 1200-900 cm-1 were applied to deconvolution analysis; the peak ratios of 1050/1020 cm-1 were calculated to analyzethe starch ordered structure,the higher the ratios,the more contents of the ordered structure.The infraredspectra in the range of 1800-700 cm-1 were selected to perform second derivative infrared spectroscopyanalysis.The results showed that the infrared spectra were similar on the whole; the ordered structure fromhigh to low was lotus root starch,potato starch and sweet potato starch; the obvious differences in positions,shapes and absorption intensities of peaks of second derivative infrared spectroscopy were observed in therange of 1607-1487 cm-1,and in the wave number of 1468,1187,1055,931 cm-1.2D-IR spectroscopy showedthat the automatic spectrum peak positions and intensities of three different starch were significantly differentin the range of 1150-1500 cm-1and 860-1200 cm-1.The results showed that the macroscopical finger printcharacters of FTIR and 2D-IR spectra could not only prove the information of main chemical constituents instarch,but also compare the components differences among the similar samples.In conclusion,the multistep IR macro-finger print method were rapid,effective,visual and accurate for starch research.

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