Patent ID: 8821791

Claim:
A liquid sample analyzer comprising: a dispensing part comprising an aspiration tube having an aspiration orifice near a tip thereof for aspirating and discharging a liquid sample to be analyzed; a measurement specimen preparing section comprising a chamber to mix a part of the liquid sample discharged from the aspiration tube and a reagent to prepare a measurement sample; a detecting part comprising a light source and a light-receiving device; an analyzing part configured to analyze the measurement sample prepared by the measurement specimen preparing section; and a controller configured to: cause the dispensing part to: aspirate a first collected material in a first region of the aspiration tube, and a second collected material in a second region of the aspiration tube between the first region and the tip; discharge the second collected material to the detecting part; and discharge the first collected material into the chamber to prepare the measurement sample; cause the detecting part to irradiate the second collected material discharged from the dispensing part with the light source and obtain optical information associated with the second collected material at the light-receiving device; determine whether or not the first collected material is the liquid sample to be analyzed based on the optical information associated with the second collected material; and output an alert responsive to a determination that the first collected material is not the liquid sample to be analyzed.