Substoichiometric separation using ion-association extraction systems

Růžička, Jaromír; Zeman, Adolf

doi:10.1016/0039-9140(65)80199-0

Cited by 18 publications

(3 citation statements)

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“…-1 + 3n (10) As the solutions of metal ion and reagent in neutron-activation analysis separations usually have concentrations near 10" 2 mole I" 1 , Equation 10 becomes p H * n 5nJ (11) For iron (III) cupferrate, pAT s = 25,…”

Section: A the Precipitation Methodsmentioning

confidence: 99%

Principles and Applications of Substoichiometric Techniques of Analysis

Baishya¹,

Heslop²,

DeVoe³

1971

C R C Critical Reviews in Analytical Chemistry

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Section: A the Precipitation Methodsmentioning

confidence: 99%

Principles and Applications of Substoichiometric Techniques of Analysis

Baishya¹,

Heslop²,

DeVoe³

1971

C R C Critical Reviews in Analytical Chemistry

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“…However, when one of these anions is pertechnetate, it is usually an amine, or component of the system comparable with other anions. On the other hand, the extraction constant, for the TcO4-(C6Hs)4 P+ ion pair is high, comparing to values for several common anions 5,8,9 and this provides conditions for its effective separation into the organic phase. For example, the distribution ratio for perrhenate, the closest chemical analog of pertechnetate, are the far highest from the large number of anions studied.…”

Section: Introductionmentioning

confidence: 94%

Extraction of pertechnetate with tetraphenylphosphonium in the presence of various acids, salts and hydroxides

Kopunec

Abudeab

Skraskova³

1998

J Radioanal Nucl Chem

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Solvent extraction of pertechnetate anions from aqueous solutions of some mineral acids (HC1, HNO3, HC104, H2SO4) , (NaC1, NaNO3, NaC104, K2CrO4, NaCO3), NaOH and NH4OH by tetraphenylphosphonium chloride in chloroform and nitrobenzene was studied. The results are presented in the form of the dependencies of extraction characteristics of TcO 4 (distribution ratio, percentage of extraction) on the (C6Hs)4PC1, H + and competitive anion concentrations. The solvent extraction of sub-and super-stoichiometric ratio of TcO4:(C6H5)4 P+ was performed. The extraction constant values of ion pairs TcO~C1 , TcO 4 NO3, TcO~C104 and of individual anions TcO4, C1 , NO3, C104 were calculated.

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“…Substoichiometric separations developed by Ruzicka, and Stary in 1961 (664) i has continued to find application in radiochemical analysis (578), particularly in the activation analysis separations of As (778), Fe(576), Hg- (575), and Sb (574). The technique has been extended to ion-association extraction systems (578). A method for carrying out continuous substoichiometric analysis has been proposed (577).…”

Section: Apparatus and Techniquesmentioning

confidence: 99%

Extraction

Freiser¹

1966

Anal. Chem.

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The rapid pace of research in solvent extraction indicated by the high rate of appearance of publications over the last decade has been maintained during the last biennium. This review surveys the literature from last 1963 to late 1965 and follows essentially the same plan of the 1964 review. In addition to the numerous new procedures which have appeared in the last two years, there has been a substantial increase in the number of distribution studies which serve to shed more light on the intimate details of extraction processes such as nature of extracted

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Substoichiometric separation using ion-association extraction systems

Cited by 18 publications

References 1 publication

Principles and Applications of Substoichiometric Techniques of Analysis

Principles and Applications of Substoichiometric Techniques of Analysis

Extraction of pertechnetate with tetraphenylphosphonium in the presence of various acids, salts and hydroxides

Extraction

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