What is chromatography? Chromatography is a technique
that scientists use to help separate and identify the components of mixtures
(solvents), such as those used in making commercial inks and dyes. Many types
of ink, like many materials, are made up of two or more different substances.
By passing a mixture through a liquid, most often water, you’re able to
separate out the components of that mixture!
In High Touch High Tech’s Chromatography Flowers experiment,
we use water’s powers to assist us in chromatography. Water is sticky, meaning
that water molecules want to stay close together. Cohesion is the force
that keeps water molecules together, while adhesion attracts water
molecules to other substances. Water is pulled up the pipe cleaner using
adhesion and cohesion, and then begins to stick to our coffee filter, climbing
across the filter and spreading outwards.
Once the water reaches the coffee filter which we have drawn
on, the chromatography process begins! The water is absorbed into the ink left
by the marker and continues to climb across the coffee filter, separating the
components of the ink!
Access the full Chromatography Flowers experiment at : https://sciencemadefun.net/downloads/chromatography_flower.pdf