Encapsulation of Nicardipine Hydrochloride and Release from Biodegradable Poly(D,L-lactic-co-glycolic acid) Microparticles by Double Emulsion Process: Effect of Emulsion Stability and Different Parameters on Drug Entrapment

Figure 4

Bottle test results demonstrating phase separation of Span 85 (a), Span 80 (b), Tween 80 (c), and PVA (d).

(a)

(b)

(c)

(d)