alexa Measurements of Binary Diffusion Coefficients in Supercritical Carbon Dioxide

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Measurements of Binary Diffusion Coefficients in Supercritical Carbon Dioxide

Diffusion is caused by random molecular motion that leads to complete mixing. In chromatography, the diffusion coefficient refers to the diffusion of a solute in a relatively or very dilute solution. So far, a number of experimental methods such as solid dissolution (SD) [10,11] pseudo steady-state solid dissolution (PSTD) [12] photon correlation spectroscopy (PCS) [13] radioactive tracer response (RTR) [14,15] nuclear magnetic resonance (NMR) [16,17] Taylor-Aris dispersion [18,19] modified Taylor- Aris dispersion [20,21] and chromatographic impulse response (CIR) [22,23] have been developed for measuring binary diffusion coefficients in SCFs. Among the above methods, most literature data [24-26] on binary diffusion coefficients in SCFs have been made by the Taylor-Aris dispersion and the CIR methods. The latter involves chromatographic adsorption, and the former does not.

 

Citation: Kong CY (2014) Measurements of Binary Diffusion Coefficients in Supercritical Carbon Dioxide. J Chromatograph Separat Techniq 5:e127. doi:10.4172/2157-7064.1000e127

 
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