Provided is an electrolyte analyzer that suppresses contamination due to contact of different reagents with a suction nozzle during reagent exchange work by a user. Therefore, the electrolyte analyzer is a reagent that installs a diluent bottle 101-1 containing a diluent, an internal standard solution bottle 101-2 containing an internal standard solution, and a comparative electrode solution bottle 101-3 containing a comparative electrode solution. A container installation unit 502 is provided, and the reagent container installation unit has a diluent bottle, an internal standard solution bottle, and a comparative electrode solution bottle installed, and a partition wall is provided between the diluent solution bottle and the internal standard solution bottle and the comparative electrode solution bottle. Have.
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