Preparation of Magnesium Creatine
Magnesium creatine chelate having a 1:1 ligand to metal molar ratio is prepared, first, by combining the following ingredients: 136.00 ml of water at 50 to 55° C.; 50.78 g of
creatine monohydrate; 14.26 g of magnesium oxide; 7.63 g of 85% o-phosphoric acid; and 35.97 g of citric acid. The reaction mixture is heated to about 50 to 55° C. and spray dried. The expected yield of the dried product is 100.00 g when adjustments are made to account for evaporation of the water formed from the acid base reaction with magnesium oxide, waters of hydration associated with creatine monohydrate and 15% water associated with phosphoric acid. The assumption is made that 5.00 ml of water from the starting material is retained in the spray drying process.
The citric acid is used in the formulation as a source of acidic H + ions so as to react with OH - ions forming water and shifting the equilibrium Mg(OH) 2 <-->Mg 2 + +2OH - to the right. This presents the magnesium to the creatine ligand as soluble Mg 2 + ions so that reaction can occur between the creatine and magnesium. The advantage of avoiding undesirable anions such as sulfate or chloride is realized by this process. Additionally, the soluble magnesium citrate initially formed has the advantage of having a higher overall pH than magnesium chloride or sulfate. This is of importance because hydrogen ions compete with metal ions for the lone pair of electrons on the amine groups. Phosphoric acid is used to bring the overall product pH down to a range that is desirable for greater food compatibility while not significantly adding to the overall weight of the finished product, and thus lowering the overall weight percent of magnesium and creatine in the product. Additionally, it has nutritive benefits and lacks the undesirable qualities associated chlorides and sulfates.
Preparation of Zinc Creatine
Zinc creatine chelate having a 1:1 ligand to metal molar ratio is prepared, first, by combining the following ingredients: 620.48 ml of water at 50 to 55° C.; 150.00 g of creatine monohydrate; 83.85 g of zinc oxide; 17.80 g of 85% o-phosphoric acid; and 106.26 g of citric acid. The reaction mixture is heated to about 50 to 55° C. and spray dried. The expected yield of the dried product is 335.32 g when adjustments are made to account for evaporation of the water formed from the acid base reaction with zinc oxide, waters of hydration associated with creatine monohydrate and 15% water associated with phosphoric acid. The assumption is made that 18.12 ml of water from the starting material is retained in the spray drying process.
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