Buffer solution for calibration and control purposes for analytical apparatus for single or combined potentiometric measurement of the pH and of the electrolytes K<+> and Na<+> and Ca<++> of aqueous solutions, in particular of blood samples

摘要

The buffer solution according to the invention consists of sodium chloride, potassium chloride, lithium chloride and [bis(2-hydroxyethyl)imino]tris[(hydroxymethyl)methane] or sodium chloride, potassium chloride and tris(hydroxymethyl)aminomethane, where appropriate calcium carbonate, dissolved in an aqueous solution to which hydrochloric acid is added.