Method of washing container used for reaction of body liquid sample and reagent

A method of washing a container in which a biological sample has reacted with a reagent to produce a reaction solution, comprising the steps of:

• (a) ejecting the reaction solution from the container;
• (b) after step (a), washing the container with a mixed solution of surface active agents, without a step of washing said container with an acidic detergent and without a step of washing said container with an alkaline detergent, said mixed solution including poly-oxyethylene alkyl ether as a major component and poly-oxyethylene poly-oxypropylene glycol ether and poly-acrylic acid salt as other components;
• (c) ejecting the mixed solution from the reaction container;
• and
• (d) after step (c), washing the container with pure water.

An automatic analyzer in which a body fluid sample and a reagent are reacted with each other in a container to produce a reaction solution, the reaction solution is measured, and the container is washed, comprising:

• a detergent solution bottle accommodating a dense detergent solution including a plurality of kinds of surface active agents, including poly-oxyethylene alkyl ether, poly-oxyethylene poly-oxypropylene glycol ether and poly-acrylic acid salt;
• an injection nozzle;
• a mixing bottle;
• means for feeding the dense detergent solution to the mixing bottle;
• means for feeding pure water as a diluent to the mixing bottle so as to dilute the dense detergent solution with the pure water;
• means for feeding the diluted dense detergent solution through the injection nozzle to the container after the reacted solution has been ejected from the container;
• a waste liquid bottle whose interior is depressurized;
• and
• a sucking nozzle through which the diluted dense detergent solution in the container is sucked towards the waste liquid bottle.