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Pure Appl. Chem., 2009, Vol. 81, No. 11, pp. 2123-2129

Published online 2009-10-26

Green approaches to colorimetric monitoring of calcium in water

Sergey B. Savvin1, Vladimir V. Kuznetsov2, Yulia V. Ermolenko2, Irina Yu. Chernikova2 and Alla V. Mikhailova1*

1 V. I. Vernadsky Institute of Geochemistry and Analytical Chemistry of the Russian Academy of Science, RAS, Moscow, ul. Kosygina, 19, Russia
2 D. Mendeleev University of Chemical Technology, Miusskaya sq. 9, 125047 Moscow, Russia

Abstract: Simple, ecologically harmless chemical reactions have always been a point of interest for chemists and analysts as fit to be applied to work in or out of laboratories. A new concept of chemical analysis is exemplified in the article by means of selective determination of calcium ions with the organic reagent arsenazo III (2,2'-[1,8-dihydroxy-3,6-disulfonaphthylene-2,7-bisazo]-bisbenzenearsonic acid disodium salt) with no application of toxic solvents during the seasonal analysis of water in the Yauza River (the city of Moscow).