Stable bicarbonate ion-containing drug solution

A container accommodating a drug solution of mixing type suitable for use for acute blood filtration, which comprises an upper chamber and a lower chamber divided with a separation wall and having a closed opening gate provided at a bottom of the lower chamber,

• wherein the lower chamber accommodates a Solution A comprising sodium ions, potassium ions, chloride ions, bicarbonate ions, and water, and
• the upper chamber accommodates a Solution B comprising sodium ions, potassium ions, calcium ions, magnesium ions, chloride ions, glucose, and water,
• the drug solution comprises a combination of the Solution A and the Solution B in a following composition (1) or a combination of the Solution A and the Solution B in a following composition (2):
• (1) the Solution A comprising 4.640 g of sodium chloride (NaCl), 0.298 g of potassium chloride (KCl), 5.377 g of sodium bicarbonate (NaHCO3), and water in an amount for a total amount of the Solution A to be 1000 mL, and
• the Solution B comprising 7.598 g of sodium chloride (NaCl), 0.298 g of potassium chloride (KCl), 0.368 g of calcium chloride (CaCl2.2H2O), 0.203 g of magnesium chloride (MgCl2.6H2O), 0.403 g of sodium dihydrogen phosphate (NaH2PO4.2H2O), 2.00 g of glucose (C6H12O6), and water in an amount for a total amount of the Solution B to be 1000 mL, and
• (2) the Solution A comprising 4.382 g of sodium chloride (NaCl), 0.298 g of potassium chloride (KCl), 5.377 g of sodium bicarbonate (NaHCO3), 0.925 g of disodium hydrogen phosphate (Na2HPO4.12H2O), and water in an amount for a total amount of the Solution A to be 1000 mL, and
• the Solution B comprising 7.706 g of sodium chloride (NaCl), 0.298 g of potassium chloride (KCl), 0.368 g of calcium chloride (CaCl2.2H2O), 0.203 g of magnesium chloride (MgCl2.6H2O), 2.00 g of glucose (C6H12O6), and water in an amount for a total amount of the Solution B to be 1000 mL,
• neither of the Solution A and the Solution B comprises acetate ions,
• a mixed solution of the Solution A and the Solution B has a monophosphate ion concentration from 2.3 to 4.5 mq/dL, a calcium ion concentration from 2.5 to 3.5 mEq/L, and a magnesium ion concentration from 1.0 to 1.5 mEg/L, wherein the monophosphate ion concentration is calculated in terms of an inorganic phosphorus concentration, and
• the separation wall is broken upon use so as to combine the Solution A and the Solution B together.