Abstract：In order to compensate for solvent bands and other background effects, a successful infrared (IR) spectral measurement requires a quality single-beam background spectrum with a desired intensity. Usually, it is extremely difficult to bring a background component to the desired intensity in practice. In order to achieve this important but difficult goal, a hybrid single-beam spectrum Φα=αΦb1+(1-α)Φb2 is introduced as the combination of two single-beam spectra Φb1 and Φb2 from the same sample but with different pathlengths (b1 and b2), where α (0≤α≤1) is the component factor. Obviously, the intensity of the hybrid spectrum Φα can be controlled easily to the desired point by simply choosing an appropriate component factor. Under appropriate conditions，the hybrid spectrum Φα is very nearly identical to the single-beam spectrum obtained from the real sample with the pathlength of b2-αb2+αb1 and the minor spectral distortion of Φα can be dismissed. As a result, the single-beam spectrum of a real sample Φb with a pathlength of b2-αb2+αb1 can be represented by α and the real sample does not need to be prepared. Experimentally, the hybrid single-beam spectrum provides a very simple, robust and efficient method to overcome the interference from background samples of IR measurements and shows valuable potential in applications of this field.
作者简介: QU Li-li，(1989—)，female, master of science, School of Chemistry and Chemical Engineering, South China University of Technology e-mail：
773606165@qq.com
引用本文:
屈丽莉，王海水，曾 强. 不需制备样品与获得期望强度的红外单光束谱[J]. 光谱学与光谱分析, 2017, 37(05): 1581-1586.
QU Li-li, WANG Hai-shui, ZENG Qiang. To Obtain an Infrared Single Beam Spectrum with a Desired Intensity without Sample Preparation. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2017, 37(05): 1581-1586.
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