Arsenazo

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.
References in periodicals archive ?
R], Brasil Calcium Arsenazo III Calcium- BioMed, Egy Colorimetric Arsenazo III Chem[R], Egypt method Phosphorus UV Endpoint Phosphorus Bioclin[R], UV K068 Quibasa Quimica Basica Ltda.
Serum calcium was determined by direct colorimetric method involving the complexation of serum calcium with Arsenazo III, to form a coloured chromophore, the absorbance of which was measured at 650 nm using autoanalyser (Erbamannhein chemistry autoanalyser, Germany) using standard Erba kits 21.
Eight hundred consecutive serum specimens received in the laboratory with a request for calcium estimation were analyzed for calcium and albumin in Erba XL 640 AutoAnalyzer by Arsenazo III method for calcium and bromocresol green in succinic acid buffer at pH 4.
The estimation of magnesium and calcium was done by Calmagite and Arsenazo 3 method with normal reference value for adult was 1.
The systemic and ultrafiltrate total calcium was detected by the arsenazo III method, and the systemic and ultrafiltrate ionized calcium was detected using an electrolyte analyzer (GEM Premier 3000, Lexington, MA, USA).
Calcium measurements were carried out by spectrophotometry using commercial kit based on the Arsenazo III method described by Endres and Rude in 1999 [3].
The same methods were used in general, except for phosphate, magnesium, and calcium (phosphomolybdate, Arsenazo, and Arsenazo III, respectively, in CALIPER).
Para medir la concentracion de calcio se siguio el metodo del arsenazo III (16), La absorbancia se determino a una longitud de onda de 650 nm en un lector de microplacas (Thermo Scientific Multiskan Spectrum, Vantaa, Finlandia).
The following methods were used: calcium: Arsenazo III dye method; uric acid: the uricase method; glucose: glucose oxidase method; aspartate aminotransferase (AST): aspartate plus the alpha ketoglutarate method; and creatine kinase (CK): the creatine phosphate method.
1986), Phosphorus: phosphomolybdate UV (Daly and Ertingshausen, 1972), Calcium: arsenazo (Baginski et al.
Thorium in drinking water is coprecipited from acidified sample with Fe(OH)3, clean by selective solvent extraction, coprecipited with Al(OH)3 and the colour is develop by arsenazo (III) reagent.