Impact of surface contamination on elemental composition of Sanguinea (Pall.) leaves Valentina A. Sagaradze, Elena Y. Babaeva, Yulia V. Zagurskaya and Tatyana I. Siromlya BIO Web Conf., 38 (2021) 00105 Published online: 28 October 2021 DOI: 10.1051/bioconf/20213800105