abstract |
A method for the preparation of the lyophilized composition comprising arsenic (LCCA), said method comprising: (A) solubilizing As2O3 powder in an aqueous medium, adding an alkalizing agent in about 10% to 100% of the amount of As2O3 powder , and adding a surfactant at about 0.5% v/v to about 4.0% v/v, but not exceeding about 50% concentration of As2O3, to form an As2O3 solution; and (B) lyophilizing said As2O3 solution, wherein said step of lyophilizing comprises: (V) freezing said As2O3 solution to generate a frozen As2O3 product; and (VI) drying said As2O3 product to generate said lyophilized composition comprising arsenic. |