| 摘要 |
A method and apparatus for controlling magnetic particles by a pipetting machine to carry out a pipetting processing for the collection of magnetic particles, their separation from a liquid, re-suspension by suspension with high accuracy, high sensitivity and high reliability. A separation region, where a magnetic field acts, is disposed inside a liquid passage connecting a distal end portion to a reservoir portion. When a liquid suspending the magnetic particles is allowed to pass through this separation region of a pipette portion for sucking or discharging the liquid, the magnetic field is applied to the separation region through the side surface of the liquid flow passage so that the magnetic particles are attracted to the inner side surface of the liquid flow passage and can be separated from the liquid. |
