| 光谱学与光谱分析 |
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| The Properties of an Infrared Hybrid Single Beam Spectrum |
| YU Ya-ling, QU Li-li, WANG Hai-shui* |
| School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China |
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Abstract A hybrid single beam spectrum øα=αøb1+(1-α)øb2=αø0e-Kb1+(1-α)ø0e-Kb2 is introduced as the combination of two single beam spectra øb1 and øb2 from the same sample but with different pathlengths (b1 and b2), where α(0＜α＜1) is the hybrid coefficient. The intensity of hybrid spectrum øα can be controlled easily to the desired point by simply choosing an appropriate α. The experimental results showed that hybrid spectrum øα is very nearly identical to øb=ø0e-K(b2-αb2+αbb) under appropriate conditions, namely øα≈øb , where øb is the single beam spectrum of the real sample with the pathlength of b2-αb2+αb1. Therefore, the desired single beam spectrum øb can be obtained easily by choosing α and we no longer need to prepare IR sample with the thickness of b. Hybrid spectrum method shows valuable potential in application of eliminating background interference.
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Received: 2016-03-16
Accepted: 2016-07-30
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Corresponding Authors:
WANG Hai-shui
E-mail: wanghsh@scut.edu.cn
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