After synthesizing a polymer grafted TiO2 nanoparticles, I subjected the PGNPs to cleavage experiment to get the polymer and did carefully centrifugation to remove to TiO2 but
NMR could not run the cleaved polymer because the ATMA keep failing and it detected 20% TiO2 in my sample. Please how can I get ride of the 5nm TiO2 in the solution?