Ternary ion exchange. Part 4.—Activity corrections for the solution phase

1983 ◽  
Vol 79 (3) ◽  
pp. 419-432 ◽  
Author(s):  
Philip Fletcher ◽  
Rodney P. Townsend
Keyword(s):  
Ion Exchange ◽  
Solution Phase

The enrichment of magnesium isotopes by AM15C5 bonded ion exchanger

2002 ◽  
Vol 90 (1) ◽  
Author(s):  
D. W. Kim ◽  
B. M. Kang
Keyword(s):  
Ion Exchange ◽  
Elution Curve ◽  
Solution Phase ◽  
Ion Exchanger ◽  
The Novel ◽  
Isotope Enrichment ◽  
Magnesium Isotopes ◽  
Resin Phase ◽  
Separation Factors ◽  
Elution Chromatography

SummaryMagnesium isotope enrichment was investigated by chemical ion exchange with a synthesized 2′-aminomethyl-15-crown-5(AM15C5) bonded Merrifield peptide resin using elution chromatography. The capacity of the novel crown ion exchanger was found to be 2.3 meq/g dry resin. The heavier isotopes of magnesium were enriched in the solution phase, while the lighter isotopes were enriched in the resin phase. The separation factor was determined according to the method of Glueckauf from the elution curve and isotopic assays. The separation factors of

Magnesium Isotope Effects by Ion Exchange Using Monoazacrown Bonded Merrifield Peptide Resin

2002 ◽  
Vol 57 (9) ◽  
pp. 1072-1078 ◽  
Author(s):  
Dong Won Kim ◽  
Hai Il Ryu ◽  
Byeong Kwang Jeon
Keyword(s):  
Ion Exchange ◽  
Distribution Coefficient ◽  
Isotope Effects ◽  
Solution Phase ◽  
Magnesium Isotopes ◽  
Magnesium Isotope ◽  
Mass Effects ◽  
Resin Phase ◽  
Separation Factors

Magnesium isotope effects by ion exchange using monoazacrown (1-aza-18-crown-6) bonded Merrifield peptide resin were investigated. The capacity and distribution coefficient were determined. The separation factors, (24Mg2+/25Mg2+)Resin/(24Mg2+/25Mg2+)Solution, (24Mg2+/26Mg2+)Resin/(24Mg2+/26Mg2+)Solution, and (25Mg2+/26Mg2+)Resin/(25Mg2+/25Mg2+)Solution were 1.0071, 1.0132, and 1.0068, respectively. The heavier magnesium isotopes were enriched in the solution phase, while the lighter isotopes were enriched in the resin phase. It was found that the hydration and isotope mass effects are more significant than that of the complexation

Chromatographic separation of lithium and magnesium isotopes by manganese(IV) oxide

2002 ◽  
Vol 90 (3) ◽  
Author(s):  
D. W. Kim ◽  
C. S. Kim ◽  
N. S. Lee ◽  
H. I. Ryu
Keyword(s):  
Ion Exchange ◽  
Chromatographic Separation ◽  
Sodium Acetate ◽  
Solution Phase ◽  
Sodium Acetate Solution ◽  
Acetate Solution ◽  
Magnesium Isotopes ◽  
Elution Chromatography

SummarySeparation of lithium and magnesium isotopes was investigated by chemical ion exchange with a manganese(IV) oxide using an elution chromatography. The capacity of manganese(IV) oxide was 0.5 meq/g. Two molar sodium acetate solution was used as an eluent. The heavier isotopes of lithium and magnesium were enriched in the solution phase, while the lighter isotopes were enriched in the MnO

Solution-phase parallel synthesis using ion-exchange resins

Tetrahedron ◽  
1998 ◽  
Vol 54 (16) ◽  
pp. 4141-4150 ◽  
Author(s):  
Mark J. Suto ◽  
Leah M. Gayo-Fung ◽  
Moorthy S.S. Palanki ◽  
Robert Sullivan
Keyword(s):  
Ion Exchange ◽  
Parallel Synthesis ◽  
Solution Phase ◽  
Ion Exchange Resins ◽  
Exchange Resins

The Mechanism of the Sorption of Monovalent Cations on Cobalt(II)-hexacyanoferrate(II)

1978 ◽  
Vol 33 (10) ◽  
pp. 1099-1101 ◽  
Author(s):  
T. Ćeranić ◽  
D. Trifunović ◽  
R. Adamović
Keyword(s):  
Ion Exchange ◽  
Chemical Properties ◽  
Solution Phase ◽  
Ion Exchanger ◽  
Monovalent Cations ◽  
Dilute Solutions ◽  
Physico Chemical ◽  
The Given ◽  
Exchange Properties ◽  
Competing Ions

Abstract Cobalt(II)-M-hexacyanoferrate(II), M = K, NH4, Cs, as synthetic sorbents have ion exchange properties selective for monovalent cations. They show a higher selectivity for the ions with larger crystal radius if the sorption takes place in dilute solutions, whereas in concentrated sulutions the selectivity sequence is reversed. The phenomenon is attributed to the differences in physico-chemical properties of the given pair of competing ions in the solution phase and to steric limitations in the phase of ion exchanger.

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