The second main step in the analysis of a dioxin/furan field sample. After the field sample has gone through extraction procedures, the dioxin/furans, if there are any, are put into a solution. The solution must be cleaned up and fractionated. This step is a series of procedures where the solution is passed through different columns of packed chemical material to purify the solution prior to injecting it into the analytical instrument.

divided into fractions, or several daily doses of radiation.

delivering the radiation dose over multiple sessions.

The process of spreading the total required treatment dose over an extended period of time.

The progressive crystallisation of successive minerals from a silicate magma in response to falling temperature.