Preparations   TOF ES-MS     Recoverya% of claimed amount   RSD% Adamine capsules, 100 mg mL-1 amantadine hydrochloride/capsule Ebixa tablets,10.0 mg mL-1 memantine hydrochloride/tab 101.55   100.50     1.45   1.59 aAverage of five different determinations

Table 4: Results of analysis of amantadine and memantine in drug products by the proposed TOF ES-MS method.