AOAC Official Method 936.07 Ash of Flour
Magnesium Acetate Method
First Action 1936
Final Action
A. Reagent
Magnesium a c e t a t e s o l u t i o n.—Dissolve 4.054 g Mg(CH3COO)2×4H2Oin50mLH2Oand dilute to 1Lwith alcohol.
B. Determination
From buret add 5 mL of the reagent to 3–5 g flour, bread, etc., or 10 mL to 1 g bran, wheat germ, etc. Let stand 1–2 min, evaporate excess
alcohol, and place in furnace at 700°C, closing door after flaming ceases. When incineration is complete, place dish in desiccator until cool; then weigh. Determine blank on solution and deduct blank from weight ash. Evaporate blank cautiously.
References: JAOAC 19, 85(1936); 20, 69(1937); 22, 522(1939).
