Analysis of Diffusion Coefficient using Reversed-Flow Gas Chromatography-A Review | Science Publications

American Journal of Applied Sciences

Khalisanni Khalid¹  Sharifuddin M. Zain¹  Rashid A. Khan¹ 

关键词: Reversed-Flow Gas Chromatography (RF-GC);    diffusion coefficients;    rate coefficients;    air-liquid;    Flame Ionization Detection (FID);    Fuller-Shettlar-Giddings (FSG);    gas chromatographic;   

DOI  :  10.3844/ajassp.2011.428.435

学科分类：自然科学（综合）

来源: Science Publications

【 摘 要 】

Problem statement: Since the earliest publication on the technique, Reversed-Flow GasChromatography (RF-GC) has been used to determine physicochemical properties by measuring the valueof one in the presence of another. The method is precise, accurate and simple compared to otherconventional techniques. Approach: The experimental setup consists of a small modification of acommercial gas chromatograph, so that it includes a four- or six-port gas sampling valve and a simple cellplaced inside the chromatographic oven. Results: This cell suppresses the effects of the carrier gas flow onthe physicochemical occurrence taking place in the stationary phase. These phenomena pertain to ratecoefficients and diffusion coefficients. Conclusion: The RF-GC methodologies can be considered as a wiseinstrumental approach to study the physicochemical phenomenon of liquid pollutants. It can be used todetermine the rate coefficients and diffusion coefficients values of samples at various temperatures for thestudies of environmental science and physical chemistry research areas. However, the methodologies arenot restricted to the current fields of research. It is also relevant in the area of food chemistry,geochemistry, material science, nanotechnology, biological science and chemical technology.

【 授权许可】

Unknown