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. 2021 Aug 18;607:121023. doi: 10.1016/j.ijpharm.2021.121023

Table 1.

Levels of critical process parameters, critical quality attributes, and quality target product profile for the preparation of drug-LPH using the Box-Behnken design.

Critical process parameters (CPPs)
(Coded independent variables)
Levels
Low
(-1)
Medium
(0)
High
(1)
A: PLGA (mg)
B: Drug (mg)
C: Stirring speed (rpm)
5
10
500
10
15
750
15
20
1000
Critical quality attributes (CQAs) Quality target product profile (QTPP)
(Responses) (Constraints)
Y1: Particle size (nm)
Y2: Zeta potentiel (mV)
Y3: EE(%)a
Minimize
Maximize
Maximize

a EE% = Encapsulation efficiency parentage.