Ion-Exchange Resins. X. Magnesium–Potassium Exchange with a Polystyrenesulfonic Acid Cation–exchange Resin

1954 ◽  
Vol 58 (11) ◽  
pp. 984-986 ◽  
Author(s):  
Harry P. Gregor ◽  
Oscar R. Abolafia ◽  
Melvin H. Gottlieb
Keyword(s):  
Ion Exchange ◽  
Cation Exchange ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Ion Exchange Resins ◽  
Acid Cation ◽  
Exchange Resins ◽  
Potassium Exchange

scholarly journals Isolation and radiochemical purification of samarium isotopes using ion exchange resins АВ 17×8 AND KU-2

2021 ◽  
Vol 21 (4) ◽  
pp. 368-377
Author(s):  
Sayan E. Salmenbayev ◽  
◽  
Nazgul K. Nurgaysinova ◽  
Gani M. Yessilkanov ◽  
Аray E. Temirzhanova ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Cation Exchange ◽  
Anion Exchange ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Chemical Elements ◽  
Cation Exchange Resin ◽  
Internal Exposure ◽  
Ion Exchange Resins ◽  
Exchange Resins

The relevance of the research is caused by the need to develop a methodological base for determining 151Sm content in the soil cover of radioactively contaminated territories of Kazakhstan. The developed method for the determining of 151Sm will make it possible to assess the levels of soil contamination with this radionuclide, to determine the character of its spatial distribution, to allow estimating the internal exposure doses for the personnel and the population. The aim of the research is to carry out the isolation and radiochemical purification of samarium isotopes from acid solutions via using ion-exchange resins AV 17×8 and KU-2. Objects: salt solutions based on nitric and hydrochloric acid containing the stable isotopes of some natural, artificial β-emitters and isotopes of U and Th. The concentrations of nitric and hydrochloric acids were equal to the concentrations of the same acids used in the routine analysis of Pu and Am. Concentrations of chemical elements were determined using the Agilent 7700x quadrupole mass spectrometer and the iCAP 6300 Duo atomic emission spectrometer. The results of the experiments on the isolation and radiochemical purification of samarium isotopes from acidic solutions using anion-exchange resin AV 17×8 and cation-exchange resin KU-2 have been presented. It has been shown that the Sm-fraction can be purified from alkaline elements, Tl and U isotopes using the KU-2 cation-exchange resin. In turn, the isotopes U, Fe and Co can be removed using an anion exchange resin in 9M HCl media.

The Inactivation of Plasma-Thromboplastin

1958 ◽  
Vol 02 (03/04) ◽  
pp. 324-341 ◽  
Author(s):  
E Deutsch ◽  
E Mammen
Keyword(s):  
Ion Exchange ◽  
Cation Exchange ◽  
Ammonium Sulfate ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Ion Exchange Resins ◽  
Morbus Addison ◽  
Serum Factors ◽  
The Difference ◽  
Exchange Resins

Summary1. Anti-plasmathromboplastin activity is found in plasma and in serum.2. The anti-plasmathromboplastin activity was increased in the majority of patients with hemophilia A and B, with chronic idiopathic thrombocytopenia, uremia, and in the cases of obstetrical afibrinogenemia, obstructive jaundice and Morbus Addison examined. It was reduced in patients with hepatitis and with cirrhosis of the liver.3. The anti-plasmathromboplastin of serum is stable on storage; it is inactivated at temperatures over 60° C; it is partially adsorbed on the ion exchange resins ICR 50 and XE 64; it is not adsorbed on BaSO4, Al2O3, Al(OH)3, Kaolin and asbestos filter pads; its activity is increased after treatment with the ion exchange resin XE 88. It is not dialysable and not soluble in ether. It inactivates plasmathromboplastin gradually. After repeated additions of plasmathromboplastin its activity is exhausted.4. Two materials with anti-plasmathromboplastin activity could be separated by fractionation with ammonium sulfate, with ethanol or by changing the pH. These two materials differ in their physical properties and in their mode of action.Anti-plasmathromboplastin I is precipitated with 33% saturated ammonium sulfate, with 15% saturation with ethanol, or at pH 6.0; it is unstable on storage, it is inactivated at 70° C; it is partially adsorbed on the cation exchange resins XE 88 and ICR 50, and completely on XE 64. It inactivates plasmathromboplastin gradually. It is more stable, when oxygen is absent or cystein is added.Anti-plasmathromboplastin II remains in solution after 80% saturation with ammonium sulfate, 53.3% saturation with ethanol, or at pH 5.0. It is storage and heat stable; it is dialysable; it is not adsorbed on cation exchange resin ICR 50; its activity is increased by treatment with ion exchange resins XE 64 and XE 88. Its action is immediate,Both anti-plasmathromboplastins migrate with the α-globulin-fraction.5. The anti-plasmathromboplastin has no phosphatase activity. It does not inactivate platelet equivalents before they have reacted with plasma and serum factors to form plasmathromboplastin. Its action seems to be stoichiometric. The action is not influenced by calcium concentrations in a range from 3 to 14 mg%.6. The difference in the degree of inactivation of plasmathromboplastin with the use of our method as compared to the method of E g l i is due to the difference in the proportions of plasmathromboplastin and anti-plasmathromboplastin used in the tests.

Use of weak cation exchange resin Lewatit S 8528 as alternative to strong ion exchange resins for calcium salt removal

2010 ◽  
Vol 97 (4) ◽  
pp. 569-573 ◽  
Author(s):  
Mónica Coca ◽  
Silvia Mato ◽  
Gerardo González-Benito ◽  
M. Ángel Urueña ◽  
M. Teresa García-Cubero
Keyword(s):  
Ion Exchange ◽  
Cation Exchange ◽  
Calcium Salt ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Ion Exchange Resins ◽  
Weak Cation Exchange ◽  
Exchange Resins

Combined ion exchange and adsorption equilibria of 5′-ribonucleotides on the strong acid cation exchange resin NH-1

2017 ◽  
Vol 92 (7) ◽  
pp. 1678-1689 ◽  
Author(s):  
Pengfei Jiao ◽  
Jinglan Wu ◽  
Yingying Wang ◽  
Jingwei Zhou ◽  
Wei Zhuang ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Cation Exchange ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Strong Acid ◽  
Adsorption Equilibria ◽  
Acid Cation

scholarly journals Removal of Ionic Liquids from Oil Sands Processing Solution by Ion-Exchange Resin

2018 ◽  
Vol 8 (9) ◽  
pp. 1611 ◽  
Author(s):  
Hong Sui ◽  
Jingjing Zhou ◽  
Guoqiang Ma ◽  
Yaqi Niu ◽  
Jing Cheng ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Ion Exchange ◽  
Oil Sands ◽  
Surface Characterization ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Ion Exchange Resin ◽  
Water Washing ◽  
Acid Cation ◽  
Exchange Resins

Ionic liquids (ILs) have been reported to be good process aids for enhanced bitumen recovery from oil sands. However, after the extraction, some ionic liquids are left in the residual solids or solutions. Herein, a washing–ion exchange combined method has been designed for the removal of two imidazolium-based ILs, ([Bmim][BF4] and [Emim][BF4]), from residual sands after ILs-enhanced solvent extraction of oil sands. This process was conducted as two steps: water washing of the residual solids to remove ILs into aqueous solution; adsorption and desorption of ILs from the solution by the sulfonic acid cation-exchange resin (Amberlite IR 120Na). Surface characterization showed that the hydrophilic ionic liquids could be completely removed from the solid surfaces by 3 times of water washing. The ionic liquids solution was treated by the ion-exchange resin. Results showed that more than 95% of [Bmim][BF4] and 90% of [Emim][BF4] could be adsorbed by the resins at 20 °C with contact time of 30 min. The effects of some typical coexisted chemicals and minerals, such as salinity, kaolinite (Al4[Si4O10](OH)8), and silica (SiO2), in the solution on the adsorption of ionic liquids have also been investigated. Results showed that both kaolinite and SiO2 exerted a slight effect on the uptake of [Bmim][BF4]. However, it was observed that increasing the ionic strength of the solution by adding salts would deteriorate the adsorption of [Bmim]+ on the resin. The adsorption behaviors of two ILs fit well with the Sips model, suggesting the heterogeneous adsorption of ionic liquids onto resin. The adsorption of ionic liquids onto Amberlite IR 120Na resin was found to be pseudo-second-order adsorption. The regeneration tests showed stable performance of ion-exchange resins over three adsorption–desorption cycles.

Rapid Separation of the Components of Nucleic Acids and Urine by High-Resolution Liquid Chromatography

1970 ◽  
Vol 16 (8) ◽  
pp. 667-676 ◽  
Author(s):  
A C Burtis ◽  
M N Munk ◽  
F R MacDonald
Keyword(s):  
Liquid Chromatography ◽  
Nucleic Acid ◽  
Ion Exchange ◽  
Cation Exchange ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Dead Volume ◽  
Rapid Separation ◽  
Exchange Resins ◽  
System Operating

Abstract The improved separations of nucleic acid components obtained with two recently developed liquid chromatography systems are presented. An ion-exchange system operating at 3000 lb/in.2, developed for use with pellicular ion-exchange resins, separates the 2',3'-ribonucleotides of the four common bases in 55 min, the 5'-deoxynucleotides in 10 min, a mixture of four dinucleotides in 30 min, and a mixture of AMP, ADP, and ATP in 3.5 min. The difficult separation of the mono-, di-, and triphosphates of the four nucleosides requires 2.5 h with the pellicular anion-exchange resin. The four bases, or their nucleosides, are separated in less than 15 min with pellicular cation-exchange resin. The system has been modified to allow separation of more than 90 uv-absorbing constituents in human urine. A versatile, nonpulsating system, operated at 5000 lb/in.2, separates the ribonucleosides in less than 5 min on small-particle, conventional cation-exchange resin. Resins from three separate sources performed comparably, but parameters such as pH, temperature, and linear velocity must be optimized for each. Both systems are designed with a minimum of dead volume and use a sensitive uv photometer. The 0.02 absorbance unit full-scale sensitivity and 1-cm pathlength of the uv photometer allow analysis of picomole quantities of nucleic acid components.

Studies on ion-exchange resins. Capacity of sulfonic acid cation-exchange resins

1951 ◽  
Vol 6 (1) ◽  
pp. 20-32 ◽  
Author(s):  
Harry P Gregor ◽  
J.I Bregman ◽  
Fradelle Gutoff ◽  
Robert D Broadley ◽  
David E Baldwin ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Cation Exchange ◽  
Sulfonic Acid ◽  
Ion Exchange Resins ◽  
Cation Exchange Resins ◽  
Acid Cation ◽  
Exchange Resins
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