Spectral fits and linear combination data for ZnO and CuO nanoparticles exposure during toxicity testing. This dataset is associated with the following publication: Ivask, A., K. Scheckel, P. Kapruwan, V. Stone, H. Yin, N. Voelcker, and E. Lombi. Complete transformation of ZnO and CuO nanoparticles in culture medium and lymphocyte cells during toxicity testing. Prof. Hakan Wallin, and Dr. Alison Elder Nanotoxicology. Informa Healthcare, London, UK, 11(2): 150-156, (2017).