Kölbel Johanna, Li Qi, Threlfall Terence L, Zeitler J Axel
Department of Chemical Engineering, University of Cambridge, Cambridge CB3 0AS, United Kingdom.
Department of Chemistry, University of Southampton, Southampton SO17 1BJ, United Kingdom.
Anal Chem. 2022 Jan 25;94(3):1713-1716. doi: 10.1021/acs.analchem.1c04279. Epub 2022 Jan 7.
A versatile setup based on a microfluidic platform allows investigation of liquid samples at various temperatures with terahertz time-domain spectroscopy. The setup is applied to develop a novel method that performs temperature and concentration calibrations of liquid samples at terahertz frequencies. Other than measuring the concentration of pure liquid phase solutions, it enables the studies of local concentration of semicrystalline systems. An equivalent solute concentration during crystallization can be calculated from the extracted absorption at low frequencies. The MgSO-water system is discussed as an example to illustrate the idea of this method.
基于微流体平台的多功能装置可利用太赫兹时域光谱技术在不同温度下对液体样品进行研究。该装置用于开发一种在太赫兹频率下对液体样品进行温度和浓度校准的新方法。除了测量纯液相溶液的浓度外，它还能用于研究半结晶体系的局部浓度。可以根据低频处提取的吸收值计算结晶过程中的等效溶质浓度。以MgSO-水体系为例讨论了该方法的思路。
