Gel filtration separation of cellulose, starch, oxytocin and palmitic acid
I think by using a gradient mobile phase that changes by time. At the beginning, the mobile phase would have higher affinity to cellulose and lower to starch and then the gradient changes where it would have higher affinity to starch than cellulose. 

Specifically, which mobile phase you would use and what gradient would take some time and research to find the answer but it think you get the idea