An analyzer system for automatic column chromatography includes chromatographic columns which are mounted in a rack. A drop removal mechanism system shakes the rack to transfer the last drop of eluate from the tip of a chromatographic column to a receptacle below the tip before the column is repositioned...http://www.google.com/patents/US5595664?utm_source=gb-gplus-sharePatent US5595664 - Column analyzer system and improved chromatograph column for use in the system
