Kulapina E. G. Mercury-graphite electrode in the voltammetric analysis of some ecological objects / E. G. Kulapina, N. N. Rodiontseva // Fundamental and applied problems of environmental protection. Vol. 3 : International conference, September, 12-16, 1995, Tomsk : abstracts. Tomsk, 1995. Vol. 3 : Physical-chemical methods of environmentalal monitoring. P. 49