Chromatographic Methods - Stock R.; Rice C. B. F. | Libro Springer 01/1974 - HOEPLI.it


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stock r.; rice c. b. f. - chromatographic methods

Chromatographic Methods

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Dettagli

Genere:Libro
Lingua: Inglese
Editore:

Springer

Pubblicazione: 01/1974
Edizione: 1974





Sommario

1 Introduction.- 2 Liquid-phase Chromatography on Columns.- 3 Paper Chromatography; Zone Electrophoresis.- 4 Gas Chromatography.- 5 Thin-layer Chromatography.- 6 Model Experiments in Chromatographic Techniques.




Trama

Classification of chromatographic methods Chromatography is the name given to a particular family of separation techniques of great effectiveness. The original method was described in 1903 by Tswett, who used it for the separation of coloured substances, and the name chromatog­ raphy stems from this. However, the limitation to coloured compounds never really obtained, and most chromatographic separations are nowadays performed on mixtures of colourless substances, including gases. Like fractional distillation, chromatography relies on the relative movement of two phases, but in chromatography one is fixed and is known as the stationary phase; the other is known as the mobile phase. Chromatographic methods may be classified first according to the nature of the mobile phase and, second, according to the nature of the stationary phase. The mobile phase may be a liquid or a gas, and the stationary phase may be a solid or a liquid. There are thus four main sub-divisions of the chromatographic process, as set out in Table 1.1. The system is called adsorption chromatography if the stationary phase is a solid, and partition chromatography if it is a liquid.







Altre Informazioni

ISBN:

9780412208102

Condizione: Nuovo
Dimensioni: 216 x 140 mm Ø 502 gr
Formato: Brossura
Pagine Arabe: 383
Pagine Romane: viii






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