NOZZLE CLEANING METHOD AND AUTOMATED ANALYZER

摘要

The purpose of this invention is to provide a nozzle cleaning method and an automated analyzer that make it possible to minimize carryover and contamination while minimizing waste of a cleaning liquid. To that end, this nozzle cleaning method is characterized by having the following steps: a first cleaning step in which a pre-pressurization liquid is discharged from a dispensing nozzle (122) in a first cleaning position so as to clean the inside wall thereof and a first cleaning liquid is applied to the outside wall of the dispensing nozzle (122) so as to clean said outside wall; a second cleaning step in which a second cleaning liquid is suctioned into the dispensing nozzle (122) in a second cleaning position so as to clean the inside wall thereof; and a third cleaning step in which the second cleaning liquid is discharged from the dispensing nozzle (122) in a third cleaning position so as to clean the inside wall thereof and a third cleaning liquid is applied to the outside wall of the dispensing nozzle (122) so as to clean said outside wall.