Ion-Exchange Chromatographic Separation of Anions on Hydrated Bismuth Oxide Impregnated Papers

Abstract

A comparative study of the chromatographic behaviour of anions, iodide, sulphide, phosphate, arsenate, arsenite, vanadate, chroraate, dichromate, thiosulphate, thiocyanate, ferricyanide and ferrocyanide on papers impregnated with hydrated bismuth oxide and untreated Whatman no, 1 papers has been made by employing identical aqueous, non-aqueous and mixed solvent systems. Sharp and compact spots were obtained with impregnated papers whereas the opposite applied to plain papers. Various analytically important binary and ternary separations are reported.     

Chromatographic Studies on Hydrous Oxides of Polyvalent Metals. II. Electrochromatographic Studies of Amino Acids on Hydrous Zirconium (IV) Oxide Papers: Separation of Acidic Amino Acids

Abstract

Electrochromatographic behaviour of some amino acids on hydrous zirconium (IV) oxide impregnated papers have been carried out. Five background electrolytes of different pH were used for these studies at fixed potential difference and time     

Electrophoretic Behaviour of 34 Organic Acids on Impregnated Strips

Abstract

Electrophoretic behaviour of 34 organic acids on calcium sulphate impregnated papers has been studied. The 19 binary separations in aqueous sodium chloride and sodium sulphate solutions and distilled water have been achieved.     

Chromatography on Papers Impregnated with Zinc Silicate: A New Adsorbent for Qualitative and Quantitative Separation of Amines

Abstract

Papers impregnated with zinc silicate have been used for the chromatographic studies of amines taken in the form of their hydrochlorides. R_f values of various amines have been determined and compared with its behaviour on plain papers. Quantitative separations of dimethylamine from methylamine, α-naphthylamine, o-toluidine and o-nitroaniline; o-phenylenediamine from m-phenylenediamine; diphenylamine from piperidine have also been achieved on columns loaded with zinc silicate exchanger.     

Ion-Exchange Chkomatographic Determination of Aming Acids On Impresgnated Papers

Abstract

The modified optical density method of Moore and Stein has been used for the estimation of amino acids present in biological samples. the mixture of amino acids were chromatographad on bismuth oxide impregnated papers, the identified spots were cut out and eluted, the optical densities were measured at 570 nm. With the help of a calibration curve, the amino acids present in the samples were estimated.     

Iron(III) Diethanolamine as a Ne Adsorbent for Chromatographic Separations of Phenols

Abstract

A new adsorbent iron(III) diethanol amine has been utilized for the chromatographic separations of phenols. R_F values of 31 phenols in ethanol and ammonia solution of four different concentrations have been studied. On the basis of difference in R_F values various analytically important qualitative separations of phenols on impregnated papers and quantitative separations on columns of iron(III) diethanolamine have been achieved.     

The Effect of Surfactants On the Chromatographic Separation of Phenols On Papers Impregnated With Hydrated Cerium Oxide

Abstract

The effect of surfactants on the chromatographic behaviour of 16 phenols of different nature have been observed on Whatman No 2 paper strips impregnated with hydrated cerium oxide. the movement of phenolic spots was observed in various mobile phase solvents with or without 4m ML^?1 8m ML^?1 and 12m ML^?1 sodium dodecyl sulphate (SDS). It is observed that the use of micellar mobile phase systems, which improve the selectivity and compactness of the spots, offered significant advantages over traditional solvents. On the basis of appreciable differences in the af values of phenols a variety of bioanalytically important binary and ternary separations were achieved without using separate detecting reagents, as most of the phenols appear as coloured spots with cerium oxide papers.     

Reverse Phase Thin-Layer Chromato-Graphy of some Metal Ions on Butyl-Amine Impregnated Silica Gel G in Formic Acid Medium

Abstract

Reversed phase thin layer chromatography of metal ions have been performed on s-butylamine and t-butylamine impregnated silica gel thin layers in formic acid and sodium formate systems. Separation potential of impregnated silica gel thin layers was explored. Impregnated silica gel layers were found to be more selective (strongly sorbing) than unimpregnated silica gel chromo-toplates. Several important binary and ternary separations were achieved on impregnated thin layers.     

Polymeric Phospholipid Analogs. XV. Polyacrylamides Containing Phosphatidyl Cholines

Abstract

p-Acryloylaminophenyl-2-(trimethylammonium)ethyl phosphate, p-methacryloylaminophenyl-2- (trimethylammonium)ethyl phosphate, and p-methacryloylbenzoylaminophenyl-2-(trimethylammonium)ethyl phosphate were prepared, characterized, and polymerized with 2,2′-azobisisobutyronitrile (AIBN). The properties of the resultant polymers are described.     

Thin Layer Chromatographic Separation of Thorium,Titanium, Zirconium and Some Rare Earths on Cellulose Impregnated Layers

Abstract

The chromatographic saparation of Thorium, Titanium, Zirconium and eight rare earths has been attempted on DBBP, HDEHP and HDEHP-TOPO impregnated cellulose plates using the solvent system MaOH-6N HNO₃?Acatyl acetone (20:15:5). An efficient seperation of 4–5 rare earths on HDEHP-TOPO impregnated plates has been achieved.     

Thin Layer Chromatographic Separation of Closely Related Dyes

Abstract

A scheme for the TLC separation of twenty five dyes on silica-gel-zinc acetate impregnated plates using a mixture of n-butanol-benzene-ethylacetate as developing system is described. Examples of separations of dyes in mixtures are reported.     

Chromatographic Behaviour of Phenols on Aliphatic Amines Impregnated Thin Layers

Abstract

The chromatographic behaviour of 40 phenols on silica gel G plates impregnated with ethylenediamine, diethylenetriamine, triethylenetetramine and hexamine has been studied and its correlation with the equilibrium constants of the adducts formed by the interaction of phenols with ethylenediamine as an impregnant has been attempted. A suitable separation scheme for these phenols on silica gel G plates impregnated with ethylenediamine and hexamine has been worked out.     

Electrochromatography of Metal Ions on Zirconium(IV) Phosphoantimonate Papers: Quantitative Separation of Platinum(IV) from Platinum Group and Other Metal Ions

Abstract

Zirconium (IV) phosphoantimonate impregnated papers have been used to study the electrochromatographic behaviour of 29 metal ions in buffers of weak organic acids with their corresponding ammonium salts as background electrolytes at fixed voltage and time intervals. As a result of these investigations, the variation in the average mobility of metal ions with the ionisation constants of the organic acids used in buffers and other parameters such as atomic numbers and charge on the metal ions has been studied. On the basis of the differential mobilites of the metal ions, which depends on the ion exchange properties of Zr(IV) phosphoantimonate and the nature of the complexes formed with the electrolytes, some binary, ternary and quarternary separation have been achieved. Besides microgram separations (25 μg-100 μg) of Pt(TV) from Pt group and other metal ions have also been achieved.     

Chromatographic behaviour of metal ions on tin(IV) and titanium(IV) antimonate papers

Summary The chromatographic behaviour of 49 metal ions has been studied on papers impregnated with Sn(IV) and Ti(IV) antimonates in aqueous HNO₃ and mixed solvent systems containing dimethyl sulphoxide. Numerous separations have been achieved and the Alberti equation, for Sn(IV) and Ti(IV) antimonate papers, in the modified form: –nloga K⁺=R_M + constant (a K⁺=activity of K⁺), has been verified. The effect of the concentration of impregnating reagents on these papers has been determined and compared with other papers. The effect of pH on R_f, R_i, log R_f and R_M values of metal ions has also been examined in aqueous systems.     

TLC Separation of some closely Related Synthetic dyes Impregnated Silica Gel Layers

Abstract

Ammonium molybdate and Copper sulphate were found as good impregnants for improving the separation of some closely related thirty synthetic dyes on silica gal ‘G’ layers using the solvent system BuOH-AcOH-H₂O (25:5:10). Tables are presented to illustrate the comparison in resolution of dyes on plain and impregnated silica gel layers.     

Ligand exchange separation of amines on copper (II) sorbed on zinc silicate

Summary Papers impregnated with Cu(II) sorbed on zinc silicate have been used to study the ligand exchange chromatographic behavior of amines. R_F values of 16 amines have been studied in 6 different systems. On the basis of differences in R_F values various analytically important qualitative separations of amines on impregnated papers and quantitative separations on columns of copper(II) sorbed on zinc silicate have been achieved.     

Thin Layer Chromatography of Some Metals on Silica Gel Layers Impregnated with Phenolic Acids

Abstract

Thin layer chromatography of metals was performed on silica gel impregnated with phenolic acids. The results obtained can be used to gain a better insight into the behaviour of metals under the proposed chromatographic conditions and as an additional system for their separation.     

Fast and simple radiochemical method for the separation of uranium,thorium and lanthanum

The concept of using paper chromatography on papers impregnated with liquid anion or cation exchangers is extended to the separation of trace elements through filtration on filter papers loaded with suitable extractant. The uptake of uranium, thorium and lanthanum from HCl and HNO₃ media of different molarities by a filter paper treated with tri-octyl amine (TOA) is investigated. The effect of the different parameters on the uptake of the studied elements is experimented. A simple and fast radiochemical procedure is developed for the separation of La, Th and U from each other.     

New Inexpensive and Selective Sorbent Phases for Rapid Thin Layer Chromatographic Analysis of Metal Ions

Abstract

New sorbent phases have been developed by impregnating silica gel G with different inorganic salts for the analysis of metal ions by thin layer chroma to graphy in carboxylic acids media. Thin layers prepared from silica gel G impregnated with ammonium chloride or barium nitrate show the unusual selectivity towards metal ions in comparison to the thin layers prepared from plain silica gel G or silica gel impregnated with silver nitrate or aluminium nitrate. Many qualitative separations     

Beiträge zur Ringofenmethodik. XVI

Zusammenfassung Eine radiometrische Ringofenmethode zur Bestimmung der Sorptionskapazität von Zellstoffkapillarträgern wird empfohlen. Gewonnene Werte für 25 Arten von Kapillarträgern verschiedener Hersteller werden mitgeteilt und mit Literaturwerten verglichen. Der Sorption liegen, aufgrund der Versuchsergebnisse, hauptsächlich Ionenaustauschprozesse zugrunde. Kennzahlen der statistischen Auswertung des Verfahrens sind angegeben.

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Contributions to ring oven methodology. XVI. A procedure for determining the sorption capacity of filter and chromatography papers

Summary A radiometric ring oven method for determination of sorption capacity of cellulose capillary papers is recommended. The values obtained for 25 kinds of capillary papers from various manufacturers are given and compared with the literature values. The experimental results indicate that sorption is mainly based on ion exchange processes. Index figures for the statistical evaluation of the procedure are given.

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XV. Mitteilung: Mikrochim. Acta [Wien]1975 I, 433.