This component traveling process is called elution. The mobile phase takes advantage of differing solubility or polarity of the components in order to separate them. Using chromatography, the components in a sample will migrate along the filter paper at different rates such that they become spread out and separated from each other. Mixtures are separated because some components will be more attracted to the stationary phase (and stick to it) while some components will be more attracted to the mobile phase (and travel with it).īy eye, we cannot know if each ink color is a mixture or pure substance. There are several types of chromatography all types employ a mobile phase or eluent (it can be liquid or gas), which is forced through a stationary phase (a solid or semi-solid). It is a common laboratory technique used to identify unknown components in mixtures. To identify components of inks by calculating R f valuesĬhromatography is a method of physically separating mixtures into its individual components.To obtain a paper chromatogram of various gel inks.To use paper chromatography to identify whether certain colored inks are pure substances or mixtures.Lab Report: Paper Chromatography of Gel Ink Pens.Part A: Preparation of Chromatography Paper.
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