Determination of lanthanum in monazite sand after selective solvent extraction separation of the picrate with dibenzo-[24]-crown-8

The Analyst ◽  
1995 ◽  
Vol 120 (12) ◽  
pp. 2861 ◽  
Author(s):  
Muhammad Idiris Saleh ◽  
Abdussalam Salhin ◽  
Bahruddin Saad
Keyword(s):  
Solvent Extraction ◽  
Selective Solvent ◽  
Extraction Separation ◽  
Selective Solvent Extraction

Selective solvent extraction of vanadium over iron from a stone coal/black shale acid leach solution by D2EHPA/TBP

2011 ◽  
Vol 105 (3-4) ◽  
pp. 359-363 ◽  
Author(s):  
Xingbin Li ◽  
Chang Wei ◽  
Zhigan Deng ◽  
Minting Li ◽  
Cunxiong Li ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Black Shale ◽  
Leach Solution ◽  
Selective Solvent ◽  
Stone Coal ◽  
Acid Leach ◽  
Selective Solvent Extraction

Assay of Apocarotenal and Canthaxanthin in Foods

1966 ◽  
Vol 49 (5) ◽  
pp. 1078-1083
Author(s):  
M Osadca ◽  
E DeRitter ◽  
R H Bunnell
Keyword(s):  
Solvent Extraction ◽  
Thin Layer ◽  
Column Chromatography ◽  
Absorption Maximum ◽  
Iodine Solution ◽  
Selective Solvent ◽  
Naturally Occurring ◽  
Selective Solvent Extraction ◽  
Coloring Agents

Abstract Methods are presented for determining the carotenoids β-apo-8′-carotenaI and canthaxanthin in foods to which they have been added as colorants. They are extracted by blending or by shaking with appropriate solvents, depending on the nature of the sample, and are separated from naturally occurring pigments and other added coloring agents by selective solvent extraction and/or column chromatography. Concentration is measured by spectrophotometric reading at the absorption maximum after the system is brought to isomerization equilibrium by treatment with iodine solution. Thin layer chromatographic procedures are described for confirming the identities and completeness of separation of the carotenoids.

Determination of uranium and thorium in complex matrices by two solvent extraction separation techniques and photon electron rejecting alpha liquid spectrometry

2001 ◽  
Vol 89 (11-12) ◽  
Author(s):  
Marin Ayranov ◽  
K. Wacker ◽  
Urs Krähenbühl
Keyword(s):  
Solvent Extraction ◽  
Marine Sediments ◽  
Alpha Spectrometry ◽  
Complex Matrices ◽  
Separation Techniques ◽  
Extraction Separation ◽  
The Matrix ◽  
Matrix Components

The separation of uranium and thorium from complex matrixes such as marine sediments using solvent extraction and determination by means of Photon-Electron Rejecting Liquid Alpha Spectrometry (PERALS®) has successfully been performed. Two extraction schemes, using TOPO and HDEHP, respectively, were compared for the separation of uranium and thorium from the matrix components. The results show recoveries between 73 and 92% for

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