Table 3 Results of photon correlation spectroscopy (PCS) measurements of nanoparticles before lyophilization, after lyophilization and rehydration, and after ultrasound treatment of 600 s at 835 kHz/1.8 MP.

From: Inertial cavitation of lyophilized and rehydrated nanoparticles of poly(L-lactic acid) at 835 kHz and 1.8 MPa ultrasound

Dispersion Z Average size, Zav [nm] Quotient Zavbefore/Zavafter PDI
Before lyophilization 110 ± 1.0 1.00 0.07 ± 0.014
After lyophilization and rehydration 122 ± 1.9 1.14 0.11 ± 0.009
After ultrasound of rehydrated lyophilisate 119 ± 1.2 1.08 0.15 ± 0.023
  1. Each result is the mean average ± standard deviation (n = 4).