For many scientific studies requiring a biological and chemical analysis of cell populations the cells must be in a high state of purity. Fluorescence activated cell sorting (FACS) is a superior method in which to obtain pure cell populations.
Basu, S., Campbell, H. M., Dittel, B. N., Ray, A. Purification of Specific Cell Population by Fluorescence Activated Cell Sorting (FACS). J. Vis. Exp. (41), e1546, doi:10.3791/1546 (2010).