基于太赫兹衰减全反射光谱的固体乳糖测试

Solid lactose test based on attenuated total reflection terahertz time-domain spectroscopy system

摘要:

利用衰减全反射式太赫兹时域光谱技术研究了固态α-乳糖的光谱特性，首先实验以传统透射式光谱技术为基准，获得了0.53 THz,1.36 THz 2个较强的吸收峰；其次，取剂量分别为1.8 mg+2.56 mg与1.8 mg的α-乳糖，利用衰减全反射式太赫兹时域光谱系统获得吸收谱线，在0.53 THz,1.36 THz均有较强吸收峰，增加样品剂量对0.53 THz,1.36 THz处吸收强度未产生影响；最后取相同剂量的2份α-乳糖，一份过筛至75 μm，另一份未过筛，利用衰减全反射式太赫兹时域光谱系统获得吸收谱线，在0.53 THz,1.36 THz均有较强吸收峰；减小样品颗粒度，在0.53 THz, 1.36 THz附近吸收强度增加。

Abstract:

The spectral characteristics of solid α-lactose are studied by using the attenuated total reflection Terahertz Time-Domain Spectroscopy(THz-TDS) technique. Firstly, the experiment is based on the traditional transmission spectroscopy technique, and two strong absorption peaks at 0.53 THz and 1.36 THz are obtained. In addition, taking two samples ofα-lactose with the doses of 1.8 mg+2.56 mg and 1.8 mg respectively the absorption lines are obtained by the attenuated total reflection THz-TDS system. Strong absorption peaks appear at 0.53 THz and 1.36 THz. Increasing the sample dose has no effect on the absorption intensity at 0.53 THz and 1.36 THz. Finally, taking two samples of α-lactose with the same doses, one is screened to 75 μm, and the other is not screened, the absorption lines are obtained by the attenuated total reflection THz-TDS system. Strong absorption peaks appear at 0.53 THz and 1.36 THz. When the particle size of the sample is reduced, the absorption intensity increases around 0.53 THz and 1.36 THz.