Strongly polar flavans are also separated by HPLC on ODS hypersil 5μm column using elution with 35 methanol in 5 formic acid as well as on reversed phase columns using methanol-water 4173 as solvent
主句：Strongly polar flavans are also separated by HPLC on ODS hypersil (5μm) column.
从句：using elution with 35% methanol in 5% formic acid as well as on reversed phase columns using methanol-water (4:1,7:3) as solvent.
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