Fig. 5From: Problems in the evaluation of polyvinylpyrrolidone (PVP) elution from polysulfone membrane dialyzers sterilized by gamma-ray irradiationConfirmation of signals from the vinylpyrrolidone (VP) skeletal structures by nuclear magnetic resonance (NMR) spectroscopy. The Avance 500-MHz spectrometer equipped with a cryoprobe (Bruker BioSpin K.K.) was used for the NMR instrument. The nuclide and solvent used were hydrogen (1H) and heavy water, respectivelyBack to article page