scholarly journals Spectrophotometric determination of rare earth elements with Pyrocatechol Violet

1966 ◽  
Vol 15 (10) ◽  
pp. 1087-1092 ◽  
Author(s):  
Tsuneo TAKANO
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Spectrophotometric Determination ◽  
Pyrocatechol Violet

The Spectrophotometric Determination of Elements with Chromazurol S in the Presence of Cetyltrimethylammonium Bromide and Triton X-100. II. Multicomponent Spectrophotometric Determination of the Sum of the Rare Earth Elements, Al, Fe and Th Using Multivariate Calibration with PLS Data Evaluation

1993 ◽  
Vol 58 (7) ◽  
pp. 1509-1524 ◽  
Author(s):  
Luděk Jančář ◽  
Jan Preisler ◽  
Lumír Sommer
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Spectrophotometric Determination ◽  
Cetyltrimethylammonium Bromide ◽  
Multivariate Calibration ◽  
Variable Number ◽  
Chromazurol S ◽  
Triton X ◽  
The Rare Earth

A procedure was developed for the simultaneous spectrophotometric determination of the sum of the rare earth elements, Al, Fe and Th using chromazurol S in the presence of cetyltrimethylammonium bromide and Triton-100 for optimized conditions at pH 5.5 and 10.2. Multivariate calibration and the PLS procedure were employed to evaluate data for a variable number of calibration solutions and wavelengths. A new procedure was described for combination of the data of independently measured systems at both pH values. The errors in the determination of the concentration values for Al, Fe, Th and the sum of the rare earth elements in model solutions and in the concentrates of the rare earth elements were not greater than 10 rel.%.

scholarly journals DERIVATIVE SPECTROPHOTOMETRIC DETERMINATION OF SOME RARE EARTH ELEMENTS IN EGYPTIAN MONAZITE.

2017 ◽  
Vol 5 (5) ◽  
pp. 1632-1643 ◽  
Author(s):  
AbdElRehimS S ◽  
◽  
MohammedA A ◽  
ElWakilA F ◽  
AbdAlAzizR S ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Spectrophotometric Determination

Recent Advances of the Asymmetric Bisazo Derivatives of Arsenazo and Phosphonazo as Chromogenic Reagents in Analytical Chemistry

1993 ◽  
Vol 12 (3-4) ◽  
Author(s):  
Jiao-Mai Pan ◽  
Chung-Gin Hsu ◽  
Zhong-Ping Ou
Keyword(s):  
Analytical Chemistry ◽  
Heavy Metals ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Spectrophotometric Determination ◽  
Short Review ◽  
The Past ◽  
Sensitivity And Selectivity ◽  
Derivatives Of

SummaryThe asymmetric bisazo derivatives of Arsenazo and Phosphonazo have been widely used as chromogenic reagents in spectrophotometric determination of thorium, uranium, rare earth elements and other heavy metals. They exhibit advantages over the symmetric reagents such as Arsenazo m and Chlorophosphonazo III both in sensitivity and selectivity. The following is a brief introduction and short review on these reagents concerning their structures, analytical characteristics, synthesis, purification and application. 182 references mainly published in the past decade are presented.

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