Method for controlling liquid chromatograph

Abstract

The method for controlling a liquid chromatograph according to the invention is a method for controlling the liquid chromatograph including a liquid delivery pump, a flow path connected to the liquid delivery pump, a flow path switching valve (an auto purge valve, an injection valve, and a stream select valve) provided in the flow path and configured to switch a plurality of connection destinations for the flow path, and a pressure sensor configured to detect at least one of a liquid delivery pressure of the liquid delivery pump, a flow path pressure in the flow path, and a pressure applied to the flow path switching valve. The method includes rotating the flow path switching valve during liquid delivery from the liquid delivery pump, and determining whether a bubble remains in the flow path based on a pressure fluctuation when the pressure lowered by rotating the flow path switching valve increases.

Dependencies are inferred from the claim text.