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The distribution of 2%-TiO2 nanoparticles of the fraction No. 5, 6, and 7 (saline) separated by CCC. Nanoparticle Distribution Analyzer (Zetasizer Nano ZS type, Malvern Instruments Ltd, Worcestershire, UK). A 0.5 ml sample solution fractioned by CCC system was measured in the analyzer within 5 min.
