Complex sentence: The mendelevium separated by this method has the advantage of being free of organic complexing agent compared to the resin column; the disadvantage is that mendelevium then elutes very late in the elution sequence, after fermium.
Split into simpler sentences: The mendelevium separated by this method has the advantage to be free of organic complexing agent compared to the resin column. The disadvantage of this method is that mendelevium then elutes very late in the elution sequence, after fermium.