Core Practical: Investigating Inks Flashcards

All 4 cards in this deck

Which technique is used to separate the coloured substances (dyes) in an ink?

Paper chromatography.

Why is the baseline in chromatography drawn in pencil?

Pencil is insoluble, so it will not dissolve and travel up the paper with the solvent.

Why must the baseline be above the level of the solvent in the beaker?

So the ink spots do not dissolve straight into the solvent instead of travelling up the paper.

In the inks core practical, which technique separates the water (solvent) from the ink?

Simple distillation.