Parameters 
Amantadine 
Memantine 
Linearity ng mL^{1} 
23.80  2380.0 
23.80  1190.0 
LOQ ng mL^{1} 
23.80 
23.80 
Regression equation 


Slope (b)^{a} 
0.003 
3.0 x 10^{3} 
SE of slope 
2.79 x 10^{5} 
9.6 x 10^{5} 
Intercept (a)^{a} 
0.178 
0.128 
SE of intercept 
0.03 
0.05 
Correlation coefficient (r) 


SE of estimation 
0.9998 
0.998 
Recovery 
0.060 
0.097 
Mean^{b}± RSD% 
98.83 ± 3.03 
99.61 ± 3.20 
^{a}Regression equation, A = a + bc, where A is the peak intensity ratio for m/z = 152.0
/180.0 for Am, and A is the peak intensity ratio for m/z = 180.0/152.0 for mem, C is
the concentration in ng mL^{1}.
^{b}n = 6. 