Patent ID: 8770046
Filing Date: 2014-07-08
Classification: G01N

Abstract:
1. An autosampler comprising: a needle whose tip is formed to be tapered; a measuring-pump for discharging and drawing in by suction a liquid through said needle; a movement mechanism for moving said needle in a horizontal direction and a vertical direction; an injection port having a needle-sealing surface and connected to an analysis flow path via a valve; and a control unit for controlling said measuring-pump and said movement mechanism, wherein after a sample solution that is held in a sample vessel is drawn in by suction through said needle, the tip of said needle is pressed against said needle-sealing surface and said sample solution is discharged so that said sample solution is introduced into said analysis flow path through said injection port; and said control unit performs a cleaning operation for cleaning said needle-sealing surface by causing said measuring-pump to draw in from a cleaning liquid vessel by suction, an amount of a cleaning liquid to be held within said injection port, then causing said needle to be moved to a position where the tip of said needle does not contact said needle-sealing surface and then causing said measuring-pump to cause a discharge and suction of the cleaning liquid into and from said injection port through said needle.