Table 1. Hierarchy of Separations Experiments.

description	analytes used in experiments or simulations
single component	one species studied at a time
idealized	binary mixtures of key target species (often 50/50 composition)
multicomponent	mixture of three or more components at concentrations relevant to target application
realistic	mixtures with representative concentrations of all known species in real-world processes, including trace contaminants
process stream	samples taken directly from real-world processes