Liquid chromatograph apparatus with a switching valve
AssigneeTosoh Corporation
InventorGen-ichi Uematsu
Life of this patent
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Abstract
A liquid chromatograph apparatus has a precolumn and an analyzing column which are connected through a 8-port-two-position-switching valve wherein the switching valve is capable of switching between two movable positions wherein a flow path for a solvent directing from the precolumn to the analyzing column is formed in one of the two movable positions; a flow path for the solvent directing from the analyzing column to the precolumn is formed in the other of the two movable positions, and the flow paths formed in the two movable positions are such that flowing directions of the solvent in the precolumn are opposite and flowing directions of the solvent in the analyzing column are the same.
Claims5
In a liquid chromatograph apparatus comprising a first column and a second column which are connected through a switching means, the liquid chromatograph apparatus being characterized in that said switching means comprises a valve body capable of switching between at least two movable positions wherein a flow path for a solvent directing from the first column to the second column is formed in one of the two movable positions;
- a flow path for the solvent directing from the second column to the first column is formed in the other of the two movable positions, and the flow paths formed in the two movable positions are such that flowing directions of the solvent in the first column are opposite and flowing directions of the solvent in the second column are the same.
Dependencies are inferred from the claim text.