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

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.

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.

scholarly journals Ion-Exchange Resins as Controlled Drug Delivery Carriers

2010 ◽  
Vol 2 (3) ◽  
pp. 597 ◽  
Author(s):  
M. V. Srikanth ◽  
S. A. Sunil ◽  
N. S. Rao ◽  
M. U. Uhumwangho ◽  
K. V. Ramana Murthy
Keyword(s):  
Drug Delivery ◽  
Ion Exchange ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Controlled Drug Delivery ◽  
Ion Exchange Resin ◽  
Ion Exchange Resins ◽  
Exchange Cation ◽  
Therapeutic Applications ◽  
Exchange Resins

Ion exchange resins (IER) are insoluble polymers that contain acidic or basic functional groups and have the ability to exchange counter-ions within aqueous solutions surrounding them. Based on the nature of the exchangeable ion of the resin as a cation or anion, it is classified as cationic or anionic exchange resins, respectively. The efficacy of ion exchange resins mainly depends upon their physical properties such as degree of cross-linking, porosity, acid base strength, stability, purity and particle size. Modified release of drugs from resinate (drug-resin complexes) is another potential application of ion exchange resins.  Due to the versatile utility of ion exchange resins, they are being used for various drug delivery and therapeutic applications. Resins used are polymers that contain appropriately substituted acidic groups, such as carboxylic and sulfonic for cation exchangers; or basic groups, such as quaternary ammonium group for anion exchangers. This review addresses different types of ion exchange resin, their properties, the chemistry; role of IER in controlled drug delivery systems, its therapeutic applications, methods of preparation of IER along with their resonates. Keywords: Anion exchange; Cation exchange; Resin; Controlled release; Resinates; Drug delivery. © 2010 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved. DOI: 10.3329/jsr.v2i3.4991               J. Sci. Res. 2 (3), 599-613 (2010) 

The non-protein nitrogen composition of grass silages: I. The estimation of the basic amino acids and non-volatile amines by chromatography on a weak cation exchange resin

1969 ◽  
Vol 72 (3) ◽  
pp. 459-466 ◽  
Author(s):  
A. D. Hughes
Keyword(s):  
Amino Acids ◽  
Ion Exchange ◽  
Cation Exchange ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Ion Exchange Chromatography ◽  
Exchange Chromatography ◽  
Protein Nitrogen ◽  
Weak Cation Exchange

SUMMARYInvestigations into the non-protein nitrogen composition of grass silages using the 50 cm strong cation-exchange column of Spackman, Stein & Moore (1958) to determine the basic amino acids led to difficulties in the determination of ethanolamine in the presence of high concentrations of ammonia, and of histidine in the presence of δ amino-n-valeric acid. An alternative technique for the ion exchange chromatography and estimation of histidine, lysine, ornithine, ethanolamine, arginine and ammonia on a weak cation-exchange resin has been developed. This method enables small amounts of ethanolamine to be determined in the presence of large amounts of ammonia and values for the ethanolamine content of a number of silage samples are presented. When used in conjunction with the technique of Spackman et al. (1958) the δ-amino-n-valeric acid content of grass silages could also be determined in the presence of histidine.The estimation of amines produced by the microbial decomposition of herbage proteins during ensiling has previously involved their initial separation from the amino acids followed by quantitative partition chromatography. An alternative method for the estimation of these amines by ion-exchange chromatography on a weak cation-exchange resin is described. This method permits the colorimetric determination of β-phenylethylamine, tyramine, tryptamine, 5-hydroxytryptamine, putrescine, cadaverine and histamine without interference from the amino acids. The efficiency of this technique has been investigated using standard solutions of the naturally occurring amines and samples of good quality and of high pH spoilt silages.

scholarly journals Adsorption Behavior of Pb, Cd, Ca, Al, Zn And Co Metal Ions on Cation Exchange Resin Dowex 50 Wx8 (Nh4+ Form) From Aqueous Acetone-Ammonium Propionate Media

2021 ◽  
Vol 9 (09) ◽  
pp. 23-27
Author(s):  
Rajan Kamble S
Keyword(s):  
Ion Exchange ◽  
Exchange Resin ◽  
Direct Action ◽  
Cation Exchange Resin ◽  
Dose Dependence ◽  
Gas Analysis ◽  
Irradiation Damage ◽  
Ion Exchange Resins ◽  
Exchange Resins ◽  
Ionizing Radiations

There has a wide interest in stability of different types of ion exchange resins against ionizing radiations. The irradiation damage and stability of polystyrendigni benzene and phenolformaldehide sulphonic acid ion exchange resins was investigated by determination of the radiolytic gases. The gas analysis showed a very good linear dose dependence of the evolved hydrogen and carbon monoxide. The linearity of carbon dioxide was good for Dowex 50 WX 10 but less pronounce for zeo-carb 215. Sulphur dioxide was at least partially produced by direct action and was consumed by secondary reaction during irradiation. Kuzin  et al [1] analysed radiolytic gases evolved from a carboxylic acid exchange resin. Wiely et al [2] investigated gamma radiation induce degradation of sulphonetic styrle resin cross link with 4 and 8 % m / p dinyl benzene isomer or mixtures thereof including commercial divenyle benzene have been shown loss in capacity 5-12. 8% at the radiation intensities of 290 R/hr and total dose 0.91 – 1.0 x 10-8 rad in presence of water.

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