Article SnippetFiltration devices and meranes Filtration of samples was performed with the following filter devices25 mm Minisart RC25 syringe filters (0.2-μm pore size, Sartorius), 15 mm Minisart RC15 (0.45-μm pore size, Sartorius), 13 mm Millex GV (0.22-μm pore size, Millipore) and 4 mm Millex GV (0.22-μm pore size, Millipore) and a