We provide methods with the Pure99 system for THC and CBD separation.  We also produce selective materials for CBN separation from THC/CBD.    For other minor cannabinoids, the separation depends on how it will elute from the column in relation to the other major cannabinoids in the sample.   That elution time and order depends on the column separation material known as the stationary phase, and the eluent, also known as the mobile phase.   Scientists who are experts at finding unique conditions that will meet the goals of the separation are called chromatographers and they do methods development to find a suitable method.