Magnetic particle parallel processing apparatus permitting repeated use of container and method of magnetic particle parallel processing permitting repeated use of container

A method of magnetic particle parallel processing permitting repeated use of a container comprising:

• a suspension storing step for storing a first liquid obtained by feeding a magnetic particle suspension to at least one reaction container;
• a whole amount suction step for sucking the whole amount of said first liquid stored in the reaction container by inserting at least one distal end of a magnetic separator which has at least one processing nozzle with the distal end for sucking and discharging a liquid through the distal end, and which also has a magnetic means capable of applying a magnetic field to the interior of the distal end, into said reaction container;
• a whole amount discharging/feeding step for discharging the whole amount of the residual first liquid from the distal end into a liquid disposal tank in a state where said magnetic particles are attracted to the inner wall of the distal end of said processing nozzle by applying a magnetic field to said distal end, and for feeding a second liquid into said reaction container in parallel with the discharging operation;
• and
• a magnetic particle contacting step for contacting said magnetic particles with said second liquid by inserting the distal end of said processing nozzle into said reaction container and sucking second liquid, wherein
• said suspension storing step, said whole amount suction step, and said whole amount discharging/feeding step are performed by relatively moving the distal end of said flow channel with respect to said reaction container, and by relatively moving said reaction container and said liquid disposal tank with respect to the distal end of said processing nozzle, and said whole amount discharging/feeding step is performed by, when the distal end of the processing nozzle is moved to a position where it is insertable into the liquid disposal tank, moving the distal end of the flow channel to a position where it is insertable into the reaction container while retaining the former position.