Reagent nozzle sipper mixing system and method

A method comprising:

• a) actuating a pump to aspirate, one-by-one, a plurality of reagents from a plurality of reagent recipients, each reagent recipient of the plurality of reagent recipients storing a reagent of the plurality of reagents, into a mixing channel through a plurality of reagent flow paths and a selector valve,
• wherein each reagent flow path of the plurality of reagent flow paths is fluidically connected to a respective reagent recipient of the plurality of reagent recipients, the mixing channel, and the selector valve;
• b) actuating the pump to eject the plurality of reagents from the mixing channel into a destination recipient through a further flow path that is different from the plurality of reagent flow paths, the selector valve, and a nozzle sipper fluidically connected to the further flow path, the mixing channel, the selector valve, and the pump;
• wherein the nozzle sipper comprises an elongated body having a central lumen extending between a proximal end and a distal end of the elongated body and a nozzle located in the distal end of the elongated body, wherein the nozzle reduces an interior diameter of the central lumen, and wherein the plurality of reagents flow through the central lumen;
• c) actuating the pump to aspirate the plurality of reagents from the destination recipient, through the nozzle sipper, and into the further flow path;
• and
• d) actuating the pump to eject the plurality of reagents from the further flow path, through the nozzle sipper, and back into the destination recipient.