Liquid chromatograph
First Claim
1. A liquid chromatograph comprising a column separating a sample, a feed part feeding a mobile phase to said column, a sample introduction part collecting said sample from a sampling needle into a sampling loop and introducing said collected sample into a mobile phase channel upstream said column by switching a channel switching valve, a detection part detecting said sample separated in said column and a control part controlling the operations of said feed part and said sample introduction part, said liquid chromatograph further comprising:
- a drain port discharging a liquid discharged from said sampling needle outward, whereinsaid control part switches said channel switching valve for connecting said feed part to a channel connecting said sampling needle through said sampling loop, locates said sampling needle on said drain port, and controls an operation switching said feed part to high-speed driving in addition to said control.
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Accused Products
Abstract
When a signal for filling up with or substituting a mobile phase is externally transmitted to a control part, the control part switches a valve for connecting a channel from a pump part to a sampling needle through a sampling loop and moves the sampling needle toward a drain port. Thus, a channel is formed through a mobile phase container→a pump→the valve→the sampling loop→the sampling needle→the drain port. In this channel state, the control part drives the pump at a high speed for substituting the channel connecting the pump and the sampling needle by a desired mobile phase.
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Citations
5 Claims
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1. A liquid chromatograph comprising a column separating a sample, a feed part feeding a mobile phase to said column, a sample introduction part collecting said sample from a sampling needle into a sampling loop and introducing said collected sample into a mobile phase channel upstream said column by switching a channel switching valve, a detection part detecting said sample separated in said column and a control part controlling the operations of said feed part and said sample introduction part, said liquid chromatograph further comprising:
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a drain port discharging a liquid discharged from said sampling needle outward, wherein said control part switches said channel switching valve for connecting said feed part to a channel connecting said sampling needle through said sampling loop, locates said sampling needle on said drain port, and controls an operation switching said feed part to high-speed driving in addition to said control. - View Dependent Claims (2, 3, 4, 5)
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Specification