Synergic extraction of gallium with thenoyltrifluoroacetone and tetraphenylarsonium chloride

1968 ◽  
Vol 40 (11) ◽  
pp. 1709-1713 ◽  
Author(s):  
Md. Syedur. Rahaman ◽  
H. L. Finston
Keyword(s):  
Synergic Extraction ◽  
Tetraphenylarsonium Chloride

Extraction of hafnium(IV) with organophosphorus reagents from solutions of mineral acids mixtures

1979 ◽  
Vol 44 (12) ◽  
pp. 3656-3664
Author(s):  
Oldřich Navrátil ◽  
Jiří Smola ◽  
Rostislav Kolouch
Keyword(s):  
Ionic Strength ◽  
Aqueous Phase ◽  
Organic Phase ◽  
Perchloric Acid ◽  
Synergic Effect ◽  
Salting Out ◽  
Initial Concentration ◽  
Mixed Complexes ◽  
Synergic Extraction ◽  
Mineral Acids

Extraction of hafnium(IV) was studied from solutions of mixtures of perchloric and nitric acids and of perchloric and hydrochloric acids for constant ionic strength, I = 2, 4, 6, or 8, and for cHf 4 . 10-4 mol l-1. The organic phase was constituted by solutions of some acidic or neutral organophosphorus reagents or of 2-thenoyltrifluoroacetone, 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone, or N-benzoyl-N-phenylhydroxylamine in benzene, chloroform, or n-octane. A pronounced synergic extraction of hafnium proceeds only on applying organophosphorus reagents from an aqueous phase whose acidity is not lower than 3M-(HClO4 + HNO3) or 5M-(HClO4 + HCl). The synergic effect was not affected markedly by a variation of the initial concentration of hafnium in the range 1 . 10-8 -4 .10-4 mol l-1, it lowered with increasing initial concentration of the organophosphorus reagent and decreasing concentration of the H+ ions. It is suggested that the hafnium passes into the organic phase in the form of mixed complexes, the salting-out effect of perchloric acid playing an appreciable part.

Synergic extraction and spectrophotometric determination of titanium(IV)

Talanta ◽  
1989 ◽  
Vol 36 (10) ◽  
pp. 1047-1049 ◽  
Author(s):  
C.P. Savariar ◽  
K. Vijayan
Keyword(s):  
Spectrophotometric Determination ◽  
Synergic Extraction

Extraction and Determination of Gold with Tetraphenylarsonium Chloride

1961 ◽  
Vol 33 (12) ◽  
pp. 1658-1660 ◽  
Author(s):  
J. W. Murphy ◽  
H. E. Affsprung
Keyword(s):  
Tetraphenylarsonium Chloride

Synergic Extraction and Transport of Folic Acid through Liquid Membranes

2015 ◽  
Vol 33 (3) ◽  
pp. 313-328 ◽  
Author(s):  
Anca-Irina Galaction ◽  
Amalia-Stela Bompa ◽  
Lenuta Kloetzer ◽  
Marius Alexandru Turnea ◽  
Dan Caşcaval
Keyword(s):  
Folic Acid ◽  
Liquid Membranes ◽  
Synergic Extraction

Determination of Tetrafluoroborate with Tetraphenylarsonium Chloride.

1964 ◽  
Vol 36 (13) ◽  
pp. 2512-2513 ◽  
Author(s):  
H. E. Affsprung ◽  
V. S. Archer
Keyword(s):  
Tetraphenylarsonium Chloride
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