PROBLEM TO BE SOLVED: To provide a standard regent for dialysis solution analysis capable of preventing precipitation for a long period and suppressing change of hydrogencarbonate ion content, which is easy to be handled without needing a complicated procedure for preparation, and can simply and accurately perform check after dialysis solution preparation in a medical site.SOLUTION: A standard regent kit for dialysis solution analysis includes: (1) a vial A filled with solution A containing an electrolyte component, which may react with carbonate ions to form precipitation; (2) a vial B filled with solution B containing at least either of hydrogencarbonate ions and carbonate ions; and (3) a transfer needle configured to mix the content of the vial A and the content of the vial B.SELECTED DRAWING: NoneCOPYRIGHT: (C)2018,JPO&INPIT