ChemInform Abstract: AMERICIUM RECOVERY AND PURIFICATION USING A COMBINED ANION EXCHANGE-EXTRACTION CHROMATOGRAPHY PROCESS

1983 ◽  
Vol 14 (1) ◽  
Author(s):  
W. I. YAMADA ◽  
L. L. MARTELLA ◽  
J. D. NAVRATIL
Keyword(s):  
Anion Exchange ◽  
Extraction Chromatography ◽  
Exchange Extraction

Separation of Pertechnetate from Uranium in a Simulated UREX Processing Solution Using Anion Exchange Extraction Chromatography

2013 ◽  
Vol 31 (4) ◽  
pp. 416-429 ◽  
Author(s):  
Gordon D. Jarvinen ◽  
Kristy M. Long ◽  
George S. Goff ◽  
Wolfgang H. Runde ◽  
Edward J. Mausolf ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Extraction Chromatography ◽  
Exchange Extraction ◽  
Processing Solution

Development and validation of the HPLC-DAD method for the quantification of 16 synthetic dyes in various foods and the use of liquid anion exchange extraction for qualitative expression determination

2022 ◽  
Vol 369 ◽  
pp. 130947
Author(s):  
Alena I. Palianskikh ◽  
Sergey I. Sychik ◽  
Sergey M. Leschev ◽  
Yekatsiaryna M. Pliashak ◽  
Tatsiana A. Fiodarava ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Synthetic Dyes ◽  
Exchange Extraction ◽  
Development And Validation ◽  
Qualitative Expression

Determination of technetium-99 in soils and radioactive wastes using ICP-MS

2006 ◽  
Vol 60 (2) ◽  
Author(s):  
A. Bartošová ◽  
P. Rajec ◽  
A. Klimeková
Keyword(s):  
Extraction Chromatography ◽  
Inductively Coupled Plasma ◽  
Radioactive Wastes ◽  
Chemical Recovery ◽  
Inductively Coupled ◽  
Iron Precipitation ◽  
Icp Ms ◽  
Exchange Extraction ◽  
99Mtc Activity

AbstractThree methods have been used for the determination of 99Tc in soils and solid radioactive wastes using 99mTc as a yield monitor. In the method one and three the samples were leached in low concentrated nitric and sulphuric acid. Many contaminants were then co-precipitated with Fe(OH)3 in alkali media and Tc in the supernatant was separated using anion-exchange extraction chromatography. There were made also some studies how to improve the chemical recovery of 99mTc in the process of chromatography. In the method two the sample was ashed and then leached in 8 mol dm−3 HNO3 and after iron precipitation, technetium was separated on chromatographic column. The chemical recovery of 99mTc was optimized in the process of chromatography and leaching. Typical recoveries of technetium determined with 99mTc tracer for all these methods were in the range 39 %–87 %.The 99Tc activity was measured using proportional low-background beta detector after one week of staying to allow decay of 99mTc activity. 99Tc was also determined by the non-radiometric method using inductively coupled plasma mass spectrometer.

Anion exchange extraction of tallium (III) and mercury (II) complex salts and application of the procedure to extraction-photometric determination of the microquantities of mercury (II)

2021 ◽  
Vol 87 (5) ◽  
pp. 20-26
Author(s):  
Yu. V. Matveichuk
Keyword(s):  
Methyl Orange ◽  
Anion Exchange ◽  
Photometric Determination ◽  
Large Mass ◽  
Hazard Class ◽  
Exchange Constants ◽  
Exchange Extraction ◽  
The Republic ◽  
Low Charge

The goal is to study the anion-exchange extraction of complex thallium (III) and mercury (II) halides (chlorides, bromides, iodides) by a method of a competing intermediate ion using the anions of various dyes — methyl orange, sodium picrate, 2,4-dinitrophenol, methyl red. Mercury (II) and thallium (III) are poisons of high toxicity. The developed method was used to study the anion-exchange extraction of acidocomplexes A solution of methyl orange trinonyloctadecylammonium (TNODA) in toluene was used as an extractant. The method provides determination of mercury (II) with an accuracy of ±2% when the concentration in the initial solution ranges within 2 – 8 × 10–8 mol/liter. It is shown that the values of the exchange constants for the same metal are larger for iodide complexes than for bromide and chloride ones. The extractability of metal halide complexes is mainly determined by their mass. Anions with a large mass have a large surface area, a low charge density, and are weakly hydrated, and thus are better extracted. The results of anion-exchange extraction were used to develop a procedure for the extraction-photometric determination of mercury (II) in granosan (ethylmercury chloride a prohibited insectofungicide of the 1st hazard class) the illegal use and storage of which could be a source of mercury pollution of groundwater in a number of regions of the Republic of Belarus. The relative error of determination does not exceed ±2%.

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