Separation and determination of α-naphthol-2- and 4-sulfonic acids by ion exchange resins
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Preconcentration of Trace Vanadium with the Ion Pair of 2-Nitroso-1-Naphthol-4-Sulfonic Acid and Tetradecyldimethylbenzylammonium Chloride Onto Microcrystaline Naphthalene and Determination by Derivative Spectrophotometry
Vanadium is quantitatively retained on 2-nitroso-1-naphhthol-4-sulfonic acid tetradecyldimethlbenzyammonium chloride onto microcrystalline naphthalene in the pH range of 3.0-4.0 from a large volume of aqueous solutions of various alloys and synthetic samples. After filtration, the solid mass consisting of the vanadium complex and naphthalene was dissolved with 5.0 mL of dimethylformamide an...
متن کاملDisplacement chromatography on synthetic ion-exchange resins. 2. The separation of organic acids and acidic amino-acids by the use of anion-exchange resins.
The application of the principle of displacement chromatography to the separation of bases and amino-acids on columns packed with the cationexchange resin Zeo-Karb 215 has been described in Part 1 of this communication (Partridge & Westall, 1949). It is expected that this method will prove to be of value in the isolation of bases and amino-acids from biological extracts of various kinds, and th...
متن کاملDisplacement chromatography on synthetic ion-exchange resins. 1. Separation of organic bases and amino-acids using cation-exchange resins.
9. Accumulation of glutamate also occurred in isolated kidney cortex, spleen, lung and chorion. Six other tissues examined maintained a concentration gradient between tissue and medium, but did not increase the glutamate concentration above the original level. 10. It is pointed out that tissue slices afford a system in which problems of permeability and storage can be studied under controlled c...
متن کاملpreconcentration of trace vanadium with the ion pair of 2-nitroso-1-naphthol-4-sulfonic acid and tetradecyldimethylbenzylammonium chloride onto microcrystaline naphthalene and determination by derivative spectrophotometry
vanadium is quantitatively retained on 2-nitroso-1-naphhthol-4-sulfonic acid tetradecyldimethlbenzyammonium chloride onto microcrystalline naphthalene in the ph range of 3.0-4.0 from a large volume of aqueous solutions of various alloys and synthetic samples. after filtration, the solid mass consisting of the vanadium complex and naphthalene was dissolved with 5.0 ml of dimethylformamide and th...
متن کاملDetermination of D - and ~ Amino Acids by Ion Exchange
A procedure for the precise determination of the D and L isomers in a given sample of an amino acid has been based upon chromatographic separation of the diastereoisomeric dipeptides obtained by derivatization with an L-amino acid N-carboxyanhydride. The conditions for the preparation of dipeptides developed by Hirschmann and associates make the derivatization step simple and rapid; the couplin...
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ژورنال
عنوان ژورنال: BUNSEKI KAGAKU
سال: 1963
ISSN: 0525-1931
DOI: 10.2116/bunsekikagaku.12.466