Pipetter, pipette tube, sample analyzing apparatus including them and method of mixing and pipetting liquids.

摘要

A pipetter capable of mixing liquids and dispensing the mixed liquid has a pipetting tube (1,2,3), actuating means (10) connected to said tube for sucking liquid into and discharging liquid from said tube, and flow disturbance means (1) in said tube spaced from the discharge and suction end thereof and adapted to cause longitudinal mixing of liquid in said tube when liquid is moved along said tube in at least one direction. Mixing is effected in the tube by causing a liquid body to move repeatedly to and fro along said tube so that during each such movement at least a portion of the liquid body passes said flow disturbance means and said liquid body is not discharged from said first end of said tube. The pipetter is useful for example in mixing a suspension of blood cells with a reagent prior to analysis.