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Abstract

A gradient solution sending apparatus includes a plurality of solution sending flow channels, a mixer, a gradient controller in which a solution sending flow rate is set, and a control device which controls a solution sending flow rate of a mobile phase of each solution sending flow channel based on the solution sending flow rate set in the gradient controller. Each channel includes a solution sending pump and a split mechanism. The solution sending pump sends the solution of each mobile phase. The split mechanism delivers a part of the mobile phase passing through the solution sending pump, and the split mechanism discharges the rest of the mobile phase from the channel. A mixer is arranged on downstream sides of the solution sending flow channels, and the mixer mixes the mobile phases sent from the solution sending flow channels and delivers the mixed mobile phase to the analysis flow channel.

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