Q124P - Chemistry: Molecular Nature Of Matter And Change

Question

A quality-control laboratory analyzes a product mixture using gas-liquid chromatography. The separation of components is more than adequate, but the process takes too long. Suggest two ways, other than changing the stationary phase, to shorten the analysis time.

Step-by-Step Solution

Answer

The two ways either using mobile phase with low solubility or length of the tower can be decreased.

Step 1: Proposing two ways for shorten time

The main thing is to propose two ways for shorten time of gas-liquid chromatography other than stationary phase change. The compound separation can be sufficient. 

Step 2: Explaining the chromatography

The method for component separation of mixture based on different solubility is chromatography. Here, solid is stationary phase whereas liquid or gas can be mobile phase. There is a high attraction to the stationary phase for one component and other can be mobile phase. The lower solubility will move faster using column. The mobile phase is an inert gas whereas stationary phase can be viscous liquid.

Step 3: Changing the column length

There is a change in the length of the column. When we shorten the column, there is a path shorten that the components go through. The change can be speed up the separation process. The same can be done by diameter reducing of the column. There is no change in stationary phase, also change the mobile phase. Hydrogen can be used instead of helium. The hydrogen used for the speeding up of time analysis.