Table 1.

Langmuir model fitted parameters (see Eqn 1) and estimated fraction of acids occupied at maximal sorption.

Peptide	Polymer	K [μM−1]	Γ0 [μmol/g PLGA]	Γmax[a] [μmol/g PLGA]	Total acids [μmol/g PLGA]	FA[b]
Leuprolide	RG 502H	0.77	1.5	229	185	1.24
Octreotide	RG 502H	1.6	8.5	163	185	0.88
Octreotide	RG 503H	1.2	2.9	81	94	0.86
Octreotide	RG 504H	n.d	n.d	~6[c]	53	n.d

^[a]Γ_max = Γ₀ + Γ₁

^[b]fraction of acids occupied (Γ_max/Total acids).

^[c]Γ_max estimated visualy from isotherm.