Table 1.
Concentration in atomic percentage of various components of C-1s on surface of PLGA-Pluronic® microparticles derived from XPS spectra along with values of monomer ratio, mass ratio, and As
| Particle type |
Concentration in atomic percentage of C-1s species
|
||||||
|---|---|---|---|---|---|---|---|
|
(1)C–C 284.8 eV |
(2)C–O 286.2 eV |
(3)C–C–O 287.2 eV |
(4)O═C–O 288.9 eV |
MnR | % MsR | As | |
| PLGA-F127 | 56.99 | 20.33 | 8.56 | 14.11 | 0.42 | 32.80 | 6.56 |
| PLGA-P123 | 56.78 | 19.00 | 8.39 | 15.83 | 0.37 | 32.50 | 6.50 |
| PLGA-L121 | 54.55 | 20.68 | 8.88 | 15.88 | 0.39 | 33.00 | 6.60 |
Abbreviations: As, degree of accumulation; MnR, monomer ratio; MsR, mass ratio; PLGA, poly(lactide-co-glycolide); XPS, X-ray photoelectron spectroscopy.