Aerosol and liquid transfer resistant pipette tip apparatus

A liquid baffle adapter assembly positioned between a pipetter assembly formed for drawing and dispensing a liquid, and a pipette tip device including a liquid drawing end and an opposite pipetter securing end formed for removably securement to a pipette tip mounting end of said pipetter assembly, said pipette tip device defining a liquid receiving chamber extending from said liquid drawing end to said pipetter securing end along a longitudinal axis thereof, said baffle adapter assembly comprising:

• a barrier structure molded together with said adapter assembly as a unit, and defining a receiving bore formed and dimensioned for snug removable receipt of said tip mounting end of said pipetter assembly, and an opposite nose portion formed and dimensioned for snug removable engagement with said pipetter securing end of said pipette tip device, said barrier structure extending transversely across said pipette tip liquid receiving chamber and defining an elongated passageway extending in the direction of said longitudinal axis through said barrier structure between an entrance at said nose portion and an exit at said receiving bore, said passageway being defined by substantially vertical walls tapering inwardly from said entrance toward said exit, and having substantial surface area relative a transverse cross-sectional area of said passageway for condensing aerosol thereon upon contact with said vertical walls, said passageway further being narrow relative the passageway longitudinal length, and including a first wall portion extending substantially perpendicular from one of said vertical walls and extending substantially across said passageway, and a plurality of oppositely facing second wall portions axially spaced in a direction toward said entrance from said first wall portion and extending substantially perpendicularly from the other one of said vertical walls in a direction away from said passageway to define with said first wall portion a plurality of spaced apart elbow-shaped channels positioned in said passageway between said entrance and said exit.