7.3.3 Sodium Potassium Tartrate Solution
Dissolve 12.0 g of Sodium Potassium Tartrate, Tetrahydrate, Sigma-Aldrich Product Number S2377, in previously heated 8.0 ml of 2 M NaOH, 50°C - 70°C. Heat directly on a heating/stir plate with constant stirring to dissolve. DO NOT BOIL.