Table 2: Physico-chemical properties of the SLN batches. Values refer to mean ? S.D. of samples analyzed within 24 h from the production.

Batch code	Z-ave (nm)	PDI	ZP (mV)
S1A	233.9 + 2.33	0.224 + 0.030	+47.4 + 2.17
S2A	245.0 + 2.11	0.270 + 0.010	+53.0 + 3.20
S3A	213.9 + 1.47	0.210 + 0.022	+47.4 + 0.97
S1B/TD>	253.1 + 3.84	0.233 + 0.021	+30.8 + 2.31
S2B	264.9 + 6.59	0.268 + 0.027	+36.5 + 2.08
S3B	322.2 + 4.73	0.259 + 0.016	+46.5 + 0.42
S2C	167.8 + 4.99	0.444 + 0.080	-26.0 + 0.11