Table 2

	PCS^a			ESCA^b
Samples	Size^c (nm)	PDI^c,d	z-pot (mV)^c	O (%)	C (%)	N (%)	Deriv.(%)
PLGA503H NPs	160 (10)	0.05 (0.01)	-25 (2)	37.8 (0.8)	63.2 (0.9)
Rituximab-PLGA503- NPs	223 (25)	0.21 (0.03)	-20 (7)	35.2 (0.5)	62 (0.7)	1.4 (0.2)	7 (1)

^aPCS: Photon Correlation Spectroscopy analysis
^bESCA: Electron Spectroscopy for Chemical Analysis
^c The values represent the means of at least three experiments; standard deviation in parentheses.
^dPDI: polydispersity index.

Table 2: Chemico-physical characterization and ESCA analysis of PLGA503H NPs and Rituximab-PLGA503NPs