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Recipe
10mM Sodium Citrate, 0.05% Tween 20, pH 6.0:
Tri-sodium citrate (dihydrate) 2.94 g
Distilled water 1000 ml
Mix to dissolve. Adjust pH to 6.0 with 1N HCl and then add 0.5 ml of Tween 20 and mix well.