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Arsenazo

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Arsenazo 

organic reagents used in analytical chemistry. There are three different reagents: arsenazo-I,-II, and -III. Arsenazo is a fine crystalline powder, dark brown or black (arsenazo-lll) in color, easily soluble in water. All arsenazo reagents are derivatives of chromotropic acid (1) and various substitutes of phenolarsenic acid (2). Arsenazo-II and arsenazo-III differ from arsenazo-I (3) by their more complicated structure. Arsenazo forms colored solutions with

many elements; these solutions can be used for the photometric determination (arsenazo -I) of the elements. They form strong complexes with such elements as thorium, zirconium, and hafnium.

REFERENCE

Kuznetsov, V. I., and V. G. Tiptsova. “Arsenazo.” In Kratkaia khimicheskaia entsiklopediia, vol. 1. Moscow, 1961. Page 292.
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1) based on gelatine gel with the electrostatically immobilized color-active reagent arsenazo III (OR) should be used in the environmental monitoring of the content of Ca2+ ions in the Yauza River within the precincts of Moscow during the spring flood.
Green approaches to colorimetric monitoring of calcium in water by Savvin, Sergey B.; Kuznetsov, Vladimir V.; Ermolenko, Yulia V.; Chernikova, Irina Yu.; Mikhailova, A / Pure and Applied Chemistry
The Abbott Architect c8000 method of total calcium determination is based on the reaction of Arsenazo III dye with calcium in an acid solution to form a blue-purple complex that is measured at 660 nm.
Erroneous detection of hypercalcemia in specimens stored in Greiner ... by Ritter, Detlef; Mayo, Mary M. / Archives of Pathology & Laboratory Medicine
The amount of extracted Ca in some selected samples was determined spectrophotometrically as an arsenazo complex using a microanalytical procedure (27).
Calcium fluoride precipitation and deposition from 12 mmol/L fluoride ... by Markovic, M.; Takagi, S.; Chow, L.C.; Frukhtbeyn, S. / Journal of Research of the National Institute of Standards and Technology
 
 
 
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