The next step is to perform detailed chromatographic analysis, employing series of upwards of ten chromatographs to gradually screen out components until they are left with individual active chemical ingredients.
下一步則將該組作色層分析，再分出數種更細的組別，這樣的分析要經十數次，一步步的篩選，才能找到草藥中有效的單一成分。