scholarly journals THE CHEMISTRY OF THE "AMINOCHROMES": PART I. THE PREPARATION AND PAPER CHROMATOGRAPHY OF PURE ADRENOCHROME

1958 ◽  
Vol 36 (5) ◽  
pp. 853-857 ◽  
Author(s):  
R. A. Heacock ◽  
C. Nerenberg ◽  
A. N. Payza
Keyword(s):  
Heavy Metal Ions ◽  
Silver Oxide ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Acid Hydrazide ◽  
Crystalline Form ◽  
Chromatographic Behavior ◽  
Mixture Prior ◽  
Solvent Systems ◽  
Dowex 1

The preparation of adrenochrome in a pure stable crystalline form has been carried out by the silver oxide oxidation of adrenaline in methanol with the use of an anion-exchange resin (Dowex-1(Cl−)) to remove heavy metal ions from the reaction mixture prior to the isolation of the product. Its paper chromatographic behavior together with that of three derivatives (adrenolutin, adrenochrome monosemicarbazone, and adrenochrome monoisonicotinic acid hydrazide) in six different solvent systems has been examined. Water was found to be the best paper chromatographic solvent so far examined for this series of compounds.

Gradient Elution Chromatography of the Acids in Concord and Other Grape Juices and Jellies

1965 ◽  
Vol 48 (3) ◽  
pp. 534-543
Author(s):  
David Jorysch ◽  
Seymour Marcus
Keyword(s):  
Citric Acid ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Free Acid ◽  
Grape Juice ◽  
Gradient Elution ◽  
Fraction Collector ◽  
Grape Juices ◽  
Dowex 1 ◽  
Elution Chromatography

Abstract The gradient elution technique was used to determine the acid profiles of grape juices and jellies prepared from their juices. Acids were separated by placing predetermined volumes of grape juices containing equal milliequivalents of free acid on columns of Dowex 1-X10 anion exchange resin in the formate form and eluting with formic acid in gradually increasing concentration. The eluates were collected in a fraction collector and evaporated to dryness on a waterbath, and the residues were titrated with standard alkali solution. The gradient elution chromatograms of the acids in Concord grape juice samples pressed in the laboratory differed only slightly from similar commercial samples. Grape juices other than Concord have similar acid patterns but show another acid peak. Grape jellies were liquefied and their acids determined by the method; the presence of added citric acid in these jellies is shown to affect the acidity patterns.

Use of EDTA-Grafted Anion-Exchange Resin for the Separation of Selective Heavy Metal Ions

2013 ◽  
Vol 3 (3) ◽  
pp. 199-207
Author(s):  
Mohammad Amdad Ali ◽  
Mohammad Arifur Rahman ◽  
A.M. Shafiqul Alam
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Anion Exchange ◽  
Heavy Metal Ions ◽  
Exchange Resin ◽  
Anion Exchange Resin

THE CHROMATOGRAPHIC DETERMINATION OF GLUTAMIC, ASPARTIC, AND CYSTEIC ACIDS USING AN ANION EXCHANGE RESIN

1957 ◽  
Vol 35 (1) ◽  
pp. 1249-1258
Author(s):  
A. M. Marko
Keyword(s):  
Amino Acids ◽  
Anion Exchange ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Chromatographic Determination ◽  
Acetate Buffer ◽  
Cysteic Acid ◽  
Acidic Amino Acids ◽  
Normal Urine ◽  
Dowex 1

Optimum conditions for the separation of the acidic amino acids glutamic, aspartic, and cysteic on an anion exchange resin, Dowex-1 × 8, have been studied. The sample to be analyzed is adjusted to pH 7 and placed on a column of Dowex-1 × 8 previously equilibrated with 0.1 M acetate buffer at pH 4. Glutamic and aspartic acids are separated by elution with 0.1 M acetate buffer at pH 4.0–4.6. Cysteic acid is eluted with 0.2 M acetate buffer at pH 5.5–5.9. With this method quantitative separation of synthetic mixtures of the acidic amino acids has been achieved. This method has also been used to determine the dicarboxylic amino acids in acid hydrolyzates of various proteins, of normal protein-free plasma, and of normal urine.

High cadmium-109 recovery from a dissolved silver target solution using dowex 1×8 anion-exchange resin

2010 ◽  
Vol 52 (5) ◽  
pp. 565-569 ◽  
Author(s):  
M. Sadeghi ◽  
M. Mirzaii ◽  
Z. Gholamzadeh ◽  
P. Sarabadani ◽  
A. Sattari
Keyword(s):  
Anion Exchange ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Silver Target ◽  
Dowex 1

THE CHEMISTRY OF THE "AMINOCHROMES": PART II. THE PREPARATION, PAPER CHROMATOGRAPHY, AND SPECTROSCOPIC PROPERTIES OF PURE ADRENOLUTIN; THE INFRARED SPECTRUM OF ADRENOCHROME

1958 ◽  
Vol 36 (11) ◽  
pp. 1550-1554 ◽  
Author(s):  
R. A. Heacock ◽  
M. E. Mahon
Keyword(s):  
Solid State ◽  
Infrared Spectrum ◽  
Exchange Resin ◽  
High Vacuum ◽  
Spectroscopic Properties ◽  
Inorganic Contaminants ◽  
Keto Form ◽  
Vacuum Sublimation ◽  
Mixture Prior ◽  
Dowex 1

The preparation of adrenolutin monohydrate in pure crystalline form has been carried out by the alkaline rearrangement of aqueous solutions of adrenochrome, prepared from the silver oxide oxidation of adrenaline in aqueous solution. An anion-exchange resin (Dowex-1 (Cl−)) was employed to remove inorganic contaminants from the reaction mixture prior to treatment with alkali. The pure anhydrous material has been prepared by the high vacuum sublimation of the monohydrate. The paper chromatographic, spectroscopic, and fluorimetric characteristics of adrenolutin have been investigated. On the basis of the infrared spectrum it is suggested that in the solid state, adrenolutin exists in the keto form, i.e. 2,3-dihydro-5,6-dihydroxy-N-methyl-3-ketoindole. The infrared spectrum of adrenochrome, in the solid state, agrees with the zwitterionic formulation suggested for this compound.

THE CHROMATOGRAPHIC DETERMINATION OF GLUTAMIC, ASPARTIC, AND CYSTEIC ACIDS USING AN ANION EXCHANGE RESIN

1957 ◽  
Vol 35 (12) ◽  
pp. 1249-1258 ◽  
Author(s):  
A. M. Marko
Keyword(s):  
Amino Acids ◽  
Anion Exchange ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Chromatographic Determination ◽  
Acetate Buffer ◽  
Cysteic Acid ◽  
Acidic Amino Acids ◽  
Normal Urine ◽  
Dowex 1

Optimum conditions for the separation of the acidic amino acids glutamic, aspartic, and cysteic on an anion exchange resin, Dowex-1 × 8, have been studied. The sample to be analyzed is adjusted to pH 7 and placed on a column of Dowex-1 × 8 previously equilibrated with 0.1 M acetate buffer at pH 4. Glutamic and aspartic acids are separated by elution with 0.1 M acetate buffer at pH 4.0–4.6. Cysteic acid is eluted with 0.2 M acetate buffer at pH 5.5–5.9. With this method quantitative separation of synthetic mixtures of the acidic amino acids has been achieved. This method has also been used to determine the dicarboxylic amino acids in acid hydrolyzates of various proteins, of normal protein-free plasma, and of normal urine.

Chelating Adsorbent for Heavy Metal Ions Prepared by Loading Anion-Exchange Resin with Thiacalix[4]arenetetrasulfonate

2003 ◽  
Vol 76 (1) ◽  
pp. 133-136 ◽  
Author(s):  
Hiroaki Matsumiya ◽  
Hideharu Masai ◽  
Yukiko Terazono ◽  
Nobuhiko Iki ◽  
Sotaro Miyano
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Anion Exchange ◽  
Heavy Metal Ions ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Chelating Adsorbent

In Vitro Evaluation of Heparin Adsorption During Haemoperfusion with Dowex 1×2 Anion Exchange Resin

1995 ◽  
Vol 23 (1) ◽  
pp. 101-108
Author(s):  
M. Fini ◽  
G. Giavaresi ◽  
M Spighi ◽  
R. Giardino ◽  
M. L. Florio
Keyword(s):  
Anion Exchange ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
In Vitro Evaluation ◽  
Dowex 1
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