An improved pipette probe in an automated chemical analysis system is provided, along with a pipette tip wash protocol to reduce carryover. The pipette tip comprises an elongated stainless-steel barrel which houses a polytetrafluoroethylene tube. The non-wettable properties of polytetrafluoroethylene...http://www.google.fr/patents/US5468453?utm_source=gb-gplus-shareBrevet US5468453 - Low carryover pipette probe
