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首页> 外文期刊>American journal of applied sciences >Analysis of Diffusion Coefficient using Reversed-Flow Gas Chromatography-A Review
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Analysis of Diffusion Coefficient using Reversed-Flow Gas Chromatography-A Review

机译：逆流气相色谱分析扩散系数-综述

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Problem statement: Since the earliest publication on the technique, Reversed-Flow Gas Chromatography (RF-GC) has been used to determine physicochemical properties by measuring the value of one in the presence of another. The method is precise, accurate and simple compared to other conventional techniques. Approach: The experimental setup consists of a small modification of a commercial gas chromatograph, so that it includes a four- or six-port gas sampling valve and a simple cell placed inside the chromatographic oven. Results: This cell suppresses the effects of the carrier gas flow on the physicochemical occurrence taking place in the stationary phase. These phenomena pertain to rate coefficients and diffusion coefficients. Conclusion: The RF-GC methodologies can be considered as a wise instrumental approach to study the physicochemical phenomenon of liquid pollutants. It can be used to determine the rate coefficients and diffusion coefficients values of samples at various temperatures for the studies of environmental science and physical chemistry research areas. However, the methodologies are not 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.
机译：问题陈述：自该技术最早发表以来，逆流气相色谱法（RF-GC）已用于通过测量一种在另一种存在下的值来确定其理化性质。与其他常规技术相比，该方法精确，准确且简单。方法：实验装置是对商用气相色谱仪的一个小修改，因此它包括一个四口或六口气体采样阀以及一个放置在色谱炉内的简单样品池。结果：该电池抑制了载气流对固定相中发生的理化反应的影响。这些现象与速率系数和扩散系数有关。结论：RF-GC方法可被视为研究液体污染物的理化现象的明智工具。可用于确定环境温度和物理化学研究领域的各种温度下样品的速率系数和扩散系数值。但是，这些方法并不局限于当前的研究领域。它还与食品化学，地球化学，材料科学，纳米技术，生物科学和化学技术领域相关。

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