50 mL of 0.1 M DAP solution was stirred (500 rpm) in a 200 mL glass reactor. 50 mL of a magnesium chloride solution was injected (~10 s) into the reactor containing DAP at 300 mL/min using a peristaltic pump (Longer BT100-2J). Aliquots of struvite solutions were taken directly from the reactor 5 s and 60 s after mixing.