By this method iron (being ferromagnetic) is extracted from mixtures.
by sifting,magnetism
methods in separating
Paper chromatography is a method.
chromatography
The simplest method is decantation.
This metod is called filtration.
Using the separating funnel method can be separated mixtures of liquids with different densities.
the method to separating chemical
Gravity separating.
across and down
A "hard method of separation" is not an expression in chemistry.
chemistry