Organic acid solutions in the chromatography of inorganic ions VIII. Cation-exchange of Mn(II), Cd(II), Co(II), Ni(II), Zn(II), Cu(II), Fe(III), Sc(III), Y(III), Eu(III), Dy(III), Ho(III), Yb(III), Ti(IV) and Nb(V) in malate media

Dadone, A.; Baffi, F.; Frache, Roberto; Cosma, B.; Mazzucotelli, A.

doi:10.1007/bf02262059

Cited by 5 publications

(4 citation statements)

References 5 publications

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“…We have investigated the possible formation of the species ML, ML 2 and ML 3 , the protonated and the hydrolysed species. The protonated species MH 2 L and M(H 2 L) 2 were introduced in our model because these species were observed that the titration curves had initial values of pH higher than expected. Assuming that hydrolysis begins with the loss of protons from water molecules coordinated to the complex and that it is followed by dimerization and subsequent polymerization, then it is obvious that this process involves a complex equilibrium [21].…”

Section: Resultsmentioning

confidence: 99%

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The Difference of the Complex Formation of the Samarium (3+) Ion with the L-malic Acid as Compared to the Neodymium (3+) Ion

Buz’ko

Sukhno

Gavriluyk

et al. 2017

Eurasian Chem. Tech. J.

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The complex formation of the neodymium Nd 3+ ion and the samarium Sm 3+ ion with L-malic acid (H 3 Mal) in the aqueous solutions was studied by pH-metric titration in pH region 2.80 to 10.00 and constant ionic strength 0.1 M KCl at 25°C. The ratios of the concentrations of the rare-earth elements (Ln) and the L-malic acid were 1:0.5, 1:1 and 1:2. The number of experimental points of each curve of pH-metric titration was 160-190 at 5-6 independent titrations. Inasmuch as the literature data give mainly the dissociation constants for the racemic DL-malic acid, acid-base equilibria of L-malic acid at ionic strength of 0.1 M KCl were also previously studied in pH 3.1-11.0 range. The number of experimental points for the each titration curve of L-malic acid was 70-100 at 8 independent titrations. The dissociation constants of Lmalic acid were calculated.The compositions and the stability constants of the rare-earth element complexes with L-malic acid were calculated by SuperQuad program for complex equilibria. It was shown, that in addition to 1:1 and 1:2 complexes with differently deprotonated L-malic acid, the hydroxocomplexes and protonated complexes of the rare-earth elements are also formed. The difference of the complex formation of the Sm 3+ ion with Lmalic acid as compared to the Nd 3+ ion was discussed.

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Section: Resultsmentioning

confidence: 99%

“…The malic acid is believed to be one of the best selective reagents for the industrial separation of the rare-earth elements and the transuranium elements [1] by the ion-exchange chromatography method [2].…”

Section: Introductionmentioning

confidence: 99%

The Difference of the Complex Formation of the Samarium (3+) Ion with the L-malic Acid as Compared to the Neodymium (3+) Ion

Buz’ko

Sukhno

Gavriluyk

et al. 2017

Eurasian Chem. Tech. J.

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“…CEC and AEC varied greatly in this step due to their different separation mechanisms. CEC followed Dadone et al's procedure 26 while AEC followed an established procedure used in our classroom settings (SI §3.1.1). For both methods, eluents with different acidities (Table 5) were added to elute different isotopes and meanwhile the fraction collection was continued.…”

Section: Ion-exchange Chromatographymentioning

confidence: 99%

“… a Exact eluting volume is subject to the column size. b D values by CEC are from Dadone et al’s work and those by AEC are from Kraus et al’s work …”

Section: Ion-exchange Chromatographymentioning

confidence: 99%

Radiochemical Separation Techniques in Classroom Settings

Wang

Abergel

2023

J. Chem. Educ.

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In view of the mounting requirements for courses in nuclear chemistry and radiochemistry, hands-on experience in the separations of radioisotopes is imperative. Three separation techniques commonly used were introduced, coprecipitation, liquid–liquid extraction, and ion-exchange chromatography. Their principles and the associated fundamental thermodynamic concepts are detailed. Their respective experimental applications to the separations of radioisotopes of one rare earth element (europium) and two transition metals (cobalt and nickel) are discussed. In-classroom experimental settings are proposed, and experiment outcomes are presented, which can be beneficial for future implementation within nuclear chemistry and radiochemistry programs in higher education.

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Analysis of Inorganic Species by Ion Chromatography and Liquid Chromatography

Krull

1986

The Importance of Chemical “Speciation” in Environmental Processes

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Organic acid solutions in the chromatography of inorganic ions VIII. Cation-exchange of Mn(II), Cd(II), Co(II), Ni(II), Zn(II), Cu(II), Fe(III), Sc(III), Y(III), Eu(III), Dy(III), Ho(III), Yb(III), Ti(IV) and Nb(V) in malate media

Cited by 5 publications

References 5 publications

The Difference of the Complex Formation of the Samarium (3+) Ion with the L-malic Acid as Compared to the Neodymium (3+) Ion

The Difference of the Complex Formation of the Samarium (3+) Ion with the L-malic Acid as Compared to the Neodymium (3+) Ion

Radiochemical Separation Techniques in Classroom Settings

Analysis of Inorganic Species by Ion Chromatography and Liquid Chromatography

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