How can I get a good resolution with HPLC of a compounds such as benzophenone, polyprenylated ?

I have an extract coelute with ccm, and with HPLC baseline drift. I have already changed eluent Acetonitrile-Water -0025% TFA, to MeOH-water-0.025% TFA, their gradient and left a long time for...

09 October 2012 7,241 3 View