Current Approaches to APSD Measurements of OIPs Based on Inertial Impaction - Good Cascade Impactor Practices, AIM and EDA for Orally Inhaled Products - page 41

AIM/Summed -
MMAD

0.75

Fraction on First
Stage of AIM

0.50

0.25

0.00
0.00

1.00 2.00 3.00 4.00 5.00 6.00

MMAD

Fig. 2.14 NGI system: mass fraction on first AIM collection stage or ratio of AIM system to cor-
responding summed stages—MMAD varied with GSD fixed at 2.0 ( From [ 43 ] , courtesy of D L
Roberts and J P Mitchell )

1.00

AIM/Summed --
GSD

0.75

Fraction on First
Stage of AIM

0.50

0.25

0.00
1.00 1.50 2.00 2.50

GSD

Fig. 2.15 NGI system: mass fraction on first AIM collection stage or ratio of AIM system to cor-
responding summed stages—GSD varied with MMAD fixed at 4.0 μ m ( From [ 43 ] , courtesy of D

L Roberts and J P Mitchell )