The resin was
washed with 1 L of 2N NH4OH. About 30 g of relatively pure mimosine was obtained after
adjusting the pH to 4.5~5.0. We have examined various conditions for mimosine purification
and observed that the type of ion exchange resin and adjustment of pH are crucial conditions
to obtaining the maximum quantity and high purity of mimosine (5 g per 1 kg fresh Leucaena
leaves, purity>95%).