Chemistry 2002 JAMB Past Questions - Question 4: The chromatographic separation of ink is based on the ability of the components to

Correct Answer

D

Explanation

The chromatographic separation of ink is based on the ability of its components to interact differently with the stationary phase and the mobile phase in the chromatography system. Chromatography is a widely used technique for separating and analyzing complex mixtures.

In chromatography, a sample is dissolved in or applied to a mobile phase, which is then passed through a stationary phase. The stationary phase can be a solid (in column chromatography) or a liquid (in thin-layer chromatography, TLC). The components of the sample interact differently with the stationary and mobile phases, leading to their separation.

The key principle behind chromatographic separation is differential partitioning or distribution of components between the stationary and mobile phases. The components that interact more strongly with the stationary phase will move more slowly through the system, while those that interact more with the mobile phase will move faster.

In the context of ink chromatography, different pigments and dyes in the ink may have varying affinities for the stationary phase. As the mobile phase (typically a solvent or a mixture of solvents) travels through the stationary phase, the components of the ink will move at different rates based on their interactions with the stationary phase. This results in the separation of the individual components of the ink, allowing for their identification and analysis.

The specific interactions between the ink components and the stationary phase depend on factors such as molecular size, polarity, and other chemical properties. Chromatography is a versatile technique and can be adapted for various types of samples and stationary phases to achieve effective separation.