Collect. Czech. Chem. Commun. 1995, 60, 802-812

Polarographic Determination of 7-Diethylamino-4-methylcoumarin

Jiří Bareka, Roman Hrnčířb and Josino C. Moreirac

a UNESCO Laboratory of Environmental Electrochemistry, Department of Analytical Chemistry, Charles University, 128 40 Prague 2, Czech Republic
b Severochema Cooperative, 461 71 Liberec, Czech Republic
c CESTEH/ENSP/FIOCRUZ, Rua Leopoldo Bulhoes 1480, Manguinhos, 210 41-210 Rio de Janeiro, Brazil


The polarographic behaviour of the title optical whitening agent was studied in aqueous-methanolic solutions. Conditions for its quantitation were found within the concentration regions of 10 to 100 μmol l-1 by tast polarography, 1 to 100 μmol l-1 by differential pulse polarography on the conventional dropping mercury electrode, and 0.1 to 10 μmol l-1 by differential pulse polarography on a static mercury drop electrode. The analytical procedures developed were applied to the determination of the compound in technical products.