Kokorina O. Y. Plastic membrane ion-selective electrode with response to the iron (III) complexanate for environmental control / O. Yu. Kokorina, T. V. Toloknova, I. P. Gorelov // 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. 43