Table 1.

Effect of pH on the particle size and zeta potential of the phosphatidylcholine nanoparticles.

Formulation	Particle size (d.nm) ± SD	PdI	Z-Pot (mV) ± SD
pH 5.0	232.7 ± 19.6	0.494	13.8 ± 2.1
pH 7.0	189.1 ± 11.9	0.544	−40.3 ± 3.0

d.nm: diameter expressed in nm; PdI: polidispersion index.

Phosphatidylcholine (PC) nanoparticles were prepared in pH 5.0 and pH 7.0 buffers and analyzed by Dynamic Light Scattering (DLS). The size and zeta potential of the particles were measured and reported as mean ± S.E.M. (n = 4).