Extraction chromatographic separation of thorium by silica gel impregnated with cyanex 923

2021 ◽  
Author(s):  
Hany Lotfy Weheish ◽  
Sherien Hussien Ahmed ◽  
Abdou Ali Abdou ◽  
Ahmed Hussien Orabi ◽  
Wagiha Hamed Mahmoud
Keyword(s):  
Silica Gel ◽  
Chromatographic Separation ◽  
Cyanex 923

Letter to the Editor

PEDIATRICS ◽  
1972 ◽  
Vol 49 (3) ◽  
pp. 466-467
Author(s):  
Louis Gluck
Keyword(s):  
Silica Gel ◽  
Chromatographic Separation ◽  
Letter To The Editor

Dr. Roux is correct; the procedure he outlines and executes which is his own modification is neither valid nor reliable. We use Silica Gel H containing (NH4)2SO4 (Dr. Roux did not) which gives a different chromatographic separation from his. His statements about Eastman chromatogram sheets No. 6061 do not apply; these cannot be charred. His application of a large overload of phospholipids (0.5 mg) gives poor separation on TLC; we use about 30 µg. We long ago advised Dr. Roux that we stopped spraying with H2SO4 since this chars less uniformly than does the heated (NH4)2SO4-Silica Gel H plate.

Detection of PG, NDGA, BHT, and BHA in Fats and Oils by Thin Layer Chromatography

1966 ◽  
Vol 49 (4) ◽  
pp. 807-809
Author(s):  
Shirley A Scheidt ◽  
Harry W Conroy
Keyword(s):  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Silica Gel ◽  
Chromatographic Separation ◽  
Fats And Oils ◽  
Adsorbent Layer ◽  
One Dimensional ◽  
Layer Chromatography

Abstract PG, NDGA, BHT, and BHA were extracted with acetonitrile from fat or oil, followed by thin layer chromatographic separation and identification. The four antioxidants were distinctly separated from one another by one-dimensional solvent development of the silica gel adsorbent layer. The chromatography required < 1 hour from spotting to visualization with 2,6-dichloroquinone chlorimide. As little as 1 μg of BHT and 0.5 μg of PG, NDGA, and BHA were detected by this method.

Analysis of Lipsticks. II. Chromatographic Separation of Castor Oil-Oleyl Alcohol Mixtures

1964 ◽  
Vol 47 (5) ◽  
pp. 885-887
Author(s):  
Frederick C Gross ◽  
Sylvan H Newburger
Keyword(s):  
Silica Gel ◽  
Infrared Spectra ◽  
Ethyl Ether ◽  
Chromatographic Separation ◽  
Castor Oil ◽  
Oleyl Alcohol ◽  
Isopropyl Ether ◽  
Alcohol Mixtures

Abstract Absorption chromatography with silica gel as the adsorbent was used to separate castor oil-oleyl alcohol mixtures, alone or in the presence of a lipstick base. Results show that oleyl alcohol can be eluted with isopropyl ether-isooctane (65+35) and castor oil with ethyl ether-isooctane (10+30). Identification was made through the infrared spectra of the residues from the eluates.

chromatographic separation of some antiemetics on silica gel-surfactant impregnated thin-layer plates

Bio-Research ◽  
2010 ◽  
Vol 7 (2) ◽  
Author(s):  
C.J Mbah ◽  
S.U Uzodinma
Keyword(s):  
Thin Layer ◽  
Silica Gel ◽  
Chromatographic Separation

Chromatographic separation of diastereoisomeric 1,2:3,4-diepoxides on silica gel tlc plates impregnated with various inorganic salts

Tetrahedron ◽  
1988 ◽  
Vol 44 (5) ◽  
pp. 1393-1396 ◽  
Author(s):  
Daniel Wyss ◽  
Thomas Esser ◽  
Urs Sequin
Keyword(s):  
Silica Gel ◽  
Chromatographic Separation ◽  
Inorganic Salts ◽  
Tlc Plates

Radioimmunoassay of three oestrogens and three androgens in the same plasma sample after extraction and chromatographic separation

1980 ◽  
Vol 94 (2) ◽  
pp. 229-234 ◽  
Author(s):  
Roberto Paradisi ◽  
Sergio Lodi ◽  
Gianfranco Bolelli ◽  
Stefano Venturoli
Keyword(s):  
Silica Gel ◽  
Column Chromatography ◽  
Clinical Studies ◽  
Chromatographic Separation ◽  
Plasma Levels ◽  
Plasma Sample ◽  
Venous Blood ◽  
Peripheral Venous Blood ◽  
Plasma Extract

Abstract. The plasma levels of oestrone (Oe1), 17β-oestradiol (Oe2), oestriol (Oe3), testosterone (T), 5α-dihydrotestosterone (DHT) and androstenedione (A) were assayed by RIA in plasma obtained from peripheral venous blood. The hormones are isolated from the plasma extract, first by Sephadex LH-20 column chromatography (Oe2/Oe3/Oe1, T, DHT, A) and after Oe1, T, DHT, A by TLC on silica gel 60 F254. The accuracy, reproducibility and sensitivity of the method make it satisfactory for clinical studies.

Chromatography of Rubber Accelerators and Antioxidants on Silica Gel

1953 ◽  
Vol 26 (2) ◽  
pp. 447-448 ◽  
Author(s):  
C. A. Parker
Keyword(s):  
Recent Work ◽  
Silica Gel ◽  
Chromatographic Separation ◽  
Chemical Change ◽  
Binary Solvent ◽  
Solvent Mixtures ◽  
High Explosives ◽  
Acetone Extracts ◽  
Rubber Accelerators ◽  
Absorption Measurements

Abstract The Chromatographic separation on alumina columns of certain components from the acetone extracts of vulcanized rubbers has been reported by Bellamy and coworkers and by Mann. As an adsorbent for such materials, alumina suffers from certain disadvantages, in particular, its tendency to favor chemical change in labile adsorbates. The successful use of silica gel/Celite for the chromatographic separation of a variety of ingredients from propellants and high explosives' suggested that this adsorbent might prove equally useful for the separation of the ingredients of vulcanized rubbers, and this has, in fact, been borne out by recent work in this laboratory. The procedure adopted for the qualitative examination of a rubber extract is as follows. A number of separate portions of the extract (each equivalent to 0.2–0.4 gram of the rubber) are chromatographed on columns of 1 cm. diameter, using a series of different binary solvent mixtures as developers. When the extruded columns have been streaked with appropriate reagents, the positions of the zones, together with the colors of the streaks, give a reasonably unambiguous identification, which can be further confirmed by ultraviolet absorption measurements.

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