A technique for the analysis and separation of colloids,
based on the movement of charged colloidal particles
in an electric field.
In gel electrophoresis the
medium is a gel, typically made of polyacrylamide
agarose, or starch. Also called electrochromatography,
is used extensively in studying mixtures of proteins,
nucleic acids, carbohydrates, enzymes, etc.
medicine it is used for determining the protein content
of body fluids.