摘要
如果样品浓度与光谱吸光率不满足朗伯比耳定律,则获得一系列不同浓度的样品的红外光谱通常需要逐个采集,步骤繁琐。利用衰减全反射(ATR)附件、杂化光谱概念和线性回归分析法,实现不制备样品就可以获得相应样品的红外光谱的目标,操作简单,效果好。浓度为c2的氯化钠(NaCl)水溶液的红外杂化光谱由浓度为c1和c3的NaCl水溶液红外光谱杂化合成(c1<c2<c3)。将杂化光谱失真程度控制在一定范围内,就可获得任意浓度c2的杂化光谱,它与c2的真实光谱高度相似。
In order to obtain their infrared spectra,a series of samples usually need to be prepared when the relationship between the concentration and absorbance of a sample is under the condition of Lambert-Beer law.The hybrid spectra and linear regression analysis are applied to obtain the infrared spectrum of the desired sample without preparation.A hybrid spectrum consists of a linear combination of two real spectra of two samples with different concentrations.The hybrid spectrum of NaCl aqueous solution with the concentration of c2 was synthesized from the infrared spectrums of samples with concentrations of c1 and c3(c1<c2<c3).To control the spectral distortion of the hybrid spectra within a small range,one can obtain the hybrid spectrum that is very similar to the real spectrum.
作者
姚蒙
王海水
YAO Meng;WANG Hai-shui(School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou 510640,China)
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2020年第S01期27-28,共2页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金项目(21773072)资助
