The reaction of UO22+ with chromazurol S and the spectrophotometric determination of uranium in the presence of Septonex

1980 ◽  
Vol 45 (5) ◽  
pp. 1525-1554 ◽  
Author(s):  
Viktor Kanický ◽  
Josef Havel ◽  
Lumír Sommer
Keyword(s):  
Salicylic Acid ◽  
Spectrophotometric Determination ◽  
Metal Cations ◽  
Optimum Conditions ◽  
Triphenylmethane Dyes ◽  
Chromazurol S

This work is concerned with a detailed study of the reaction of UO2+2 with chromazurol S in the presence of cationic tenside Septonex, which was found to be very promising of the group of cationic tensides. From the study were drawn a number of conclusions regarding the effect of the cationic tenside on the reaction of triphenylmethane dyes with salicylic acid groups with metal cations. Optimum conditions for the spectrophotometric determination of uranium with chromazurol S in the presence of Septonex were found.

Spectrophotometric study of analytical reactions of triphenylmethane dyes with uranyl in the presence of cationic surfactants

1988 ◽  
Vol 53 (7) ◽  
pp. 1424-1460 ◽  
Author(s):  
Luděk Jančář ◽  
Josef Havel ◽  
Lumír Sommer
Keyword(s):  
Numerical Analysis ◽  
Cationic Surfactants ◽  
Spectrophotometric Study ◽  
Micellar Medium ◽  
Uranyl Ions ◽  
Optimum Conditions ◽  
Triphenylmethane Dyes ◽  
Chromazurol S ◽  
Absorbance Data

Numerical analysis of absorbance data for the analytically significant UO22+ - Chromazurol B, UO22+ - Chromazurol S, and UO22+ - Eriochromcyanine R systems in the presence of the cationic surfactant SeptonexR revealed that also in micellar medium, complex equilibria establish and several complexes are formed in dependence on pH and concentration of uranyl ions, reagent, and surfactant. Based on the results, optimum conditions are found for the spectrophotometric determination of low concentration of uranium.

scholarly journals Spectrophotometric determination of titanium with Chromazurol S

1966 ◽  
Vol 15 (9) ◽  
pp. 913-917 ◽  
Author(s):  
Yoshizo HORIUCHI ◽  
Hiroshi NISHIDA
Keyword(s):  
Spectrophotometric Determination ◽  
Chromazurol S

Spectrophotometric determination of titanium with salicylic acid

1978 ◽  
Vol 292 (4) ◽  
pp. 299-299 ◽  
Author(s):  
A. C. Gonçalves ◽  
H. A. de Salles Andrade
Keyword(s):  
Salicylic Acid ◽  
Spectrophotometric Determination

scholarly journals Spectrophotometric determination of cobalt with Chromazurol S and hydroxydodecyl trimethylammonium bromide

1969 ◽  
Vol 18 (2) ◽  
pp. 204-207 ◽  
Author(s):  
Yoshio SHIJO ◽  
Tsugio TAKEUCHI ◽  
Shogo YOSHIZAWA
Keyword(s):  
Spectrophotometric Determination ◽  
Chromazurol S

On the spectrophotometric determination of with 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol

1988 ◽  
Vol 66 (3) ◽  
pp. 401-405 ◽  
Author(s):  
Lumír Sommer ◽  
Eva Šamlotová
Keyword(s):  
Spectrophotometric Determination ◽  
Natural Water ◽  
Water Samples ◽  
Sodium Sulphate ◽  
Optimum Conditions ◽  
Reaction Conditions ◽  
Masking Agents ◽  
Triton X ◽  
Sulphosalicylic Acid

2-(5-Bromo-2-pyridylazo)-5-diethylaminophenol (5-Br-PADAP) is a suitable reagent for the spectrophotometric determination of uranium but results are easily influenced by the reaction conditions as well as various common ions and masking agents. Optimum conditions, which must be carefully maintained, are 30% (v/v) dimethylformamide, 0.1% triton X-100, ≥ 8 × 10−5 M 5-Br-PADAP, 8 × 10−2 M triethanolamine, 7 × 10−3 M sodium fluoride, 10−2 M 5-sulphosalicylic acid, and 579 nm. Sodium sulphate (10−2 M) and CDTA (5.7 × 10−3 M) may serve as additional masking agents. A previous separation of uranium by extraction with 0.1 M tri-n-octylamine in benzene from 4 M HCl and re-extraction of 0.3 M HCl is recommended for analysis of natural water samples.

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