scholarly journals Sequential determination of 99Tc and 126Sn in radioactive concentrate

2017 ◽  
Vol 10 (1) ◽  
pp. 61-64 ◽  
Author(s):  
Veronika Silliková ◽  
Silvia Dulanská
Keyword(s):  
Anion Exchange ◽  
Exchange Resin ◽  
Scintillation Counter ◽  
Cation Exchange Resin ◽  
Sequential Method ◽  
Time Activity ◽  
Sequential Determination ◽  
Short Period ◽  
Time Required

Abstract This paper describes a new sequential method using anion exchange resin, which is commercially available from Eichrom Technologies, Inc., for the determination of 99Tc and 126Sn in nuclear waste samples. For the determination of non-actinide radionuclides in radioactive wastes, several methods have been recently introduced. This method is suitable for the separation of radionuclides 99Tc and 126Sn from acidic solutions. Samples after digestion were directly loaded in 2 mol·dm-3 HCl acid on a cation exchange resin and then on an anion exchange. They were eluted with HNO3. After elution, the eluted fractions were measured either by gamma spectrometry on an HPGe detector or liquid scintillation counter with high chemical recoveries for a short period of time. Activity concentrations of 126Sn were below minimum detectable activity (MDA) for each experiment. A new radioanalytical method for the sequential determination of 99Tc and 126Sn in radioactive concentrates has been developed and successfully applied. The main advantage of the method was the time required for the separation of radionuclides, which was only five hours, and single column separation for the determination of these radionuclides, which makes the method very effective and cheap.

An improved separation scheme for Sr through fluoride coprecipitation combined with a cation-exchange resin from geological samples with high Rb/Sr ratios for high-precision determination of Sr isotope ratios

2020 ◽  
Vol 35 (5) ◽  
pp. 953-960
Author(s):  
Wen-Gang Liu ◽  
Shuang Wei ◽  
Jian Zhang ◽  
Cong Ao ◽  
Fu-Tian Liu ◽  
...  
Keyword(s):  
Cation Exchange ◽  
High Precision ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Separation Scheme ◽  
Geological Samples ◽  
Sr Isotope ◽  
Precision Determination ◽  
High Precision Determination

A new separation method for Sr involving HF coprecipitation combined with AG50 resin from samples with high Rb/Sr ratios.

Ion Exchange Method for Rapid Determination of Alkalinity of Water-Soluble Tea Ash Containing High Levels of Manganese

1980 ◽  
Vol 63 (3) ◽  
pp. 460-461
Author(s):  
Saidul Z Qureshi ◽  
Fadhil M Najib ◽  
Fahmi A Mohammed
Keyword(s):  
Ion Exchange ◽  
Cation Exchange ◽  
Exchange Resin ◽  
Rapid Determination ◽  
Cation Exchange Resin ◽  
Water Soluble ◽  
Exchange Method ◽  
Strong Cation Exchange ◽  
Ion Exchange Method

Abstract An ion exchange method to determine the alkalinity of water-soluble tea ash containing high levels of manganese is described. A chromatographic column containing a strong cation exchange resin (20–50 mesh) in Na+ form, with a bed volume of 5 mL is used. The present ion exchange method is compared to pH titrations and also to the official AOAC methods (31.012, 31.015, 31.016). Results with the new method are accurate and precise.

Measurement of Lead in Biological Materials by Combined Anion-Exchange Chromatography and Atomic Absorption Spectrophotometry

1971 ◽  
Vol 17 (3) ◽  
pp. 152-155 ◽  
Author(s):  
Harold Lyons ◽  
F E Quinn
Keyword(s):  
Atomic Absorption ◽  
Anion Exchange ◽  
Alkali Metals ◽  
Exchange Resin ◽  
Anion Exchange Chromatography ◽  
Atomic Absorption Spectrophotometry ◽  
Exchange Chromatography ◽  
Absorption Spectrophotometry ◽  
Speed And Accuracy

Abstract A method for determination of lead in blood, urine, and tissue is presented. This procedure combines the selective concentration of lead by, and the elimination of large quantities of alkali metals on, an anion-exchange resin with the speed and accuracy of determination by atomic absorption spectrophotometry.

Analysis of Sodium Diphenylhydantoin and Phenobarbital Combinations by Nonaqueous Titration

1968 ◽  
Vol 51 (5) ◽  
pp. 1013-1016
Author(s):  
Sura J P Agarwal ◽  
Martin I Blake
Keyword(s):  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Ammonium Hydroxide ◽  
Butyl Alcohol ◽  
Dosage Forms ◽  
Direct Titration ◽  
Titration Procedure ◽  
Tert Butyl Alcohol ◽  
Preliminary Separation

Abstract A simple, nonaqueous titration procedure is described for the determination of sodium diphenylhydantoin and phenobarbital combinations. Preliminary separation of the components is unnecessary. The phenobarbital content is determined by direct titration in tert.-butyl alcohol, using sodium methoxide or triethyl n-butyl ammonium hydroxide as the titrant. The total acidity is determined by titration of the sample after passage through a cation exchange resin (Amberlite IRC-50). The sodium diphenylhydantoin content is obtained by difference. Quantitative recoveries were obtained for synthetic mixtures and commercially available dosage forms

Analysis of Organic Acids in Fruit Products by Anion Exchange Isolation and Gas Chromatographic Determination

1973 ◽  
Vol 56 (5) ◽  
pp. 1257-1263 ◽  
Author(s):  
David W Baker
Keyword(s):  
Organic Acids ◽  
Formic Acid ◽  
Anion Exchange ◽  
Exchange Resin ◽  
Trimethylsilyl Ether ◽  
Cation Exchange Resin ◽  
Chromatographic Determination ◽  
Alcoholic Extract ◽  
Resin Column ◽  
Acidic Components

Abstract The method described involves passing an alcoholic extract of fruit product through a cation exchange resin column and then through an anion exchange resin column. Neutral fruit components are washed from the columns with alcohol and acetone solutions. Acidic components trapped on the anion column are eluted using 6N formic acid in acetone. An aliquot of the eluate is evaporated to dryness after the addition of benzene to remove the excess formic acid as an azeotrope. The residue is allowed to react with bis(trimethylsilyl)acetamide or bis(trimethylsilyl)trifluoroacetamide to form trimethylsilyl ether-ester derivatives which are detected by gas chromatography on a nonpolar (OV-1) column. Good recoveries were obtained for some common organic acids (succinic, fumarie, malic, tartaric, trans- aconitic, and citric acids) from fruit juice.

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