By V. G. Berezkin
During this two-part monograph, the writer describes sleek equipment for the fast column liquid chromatography of excessive- and medium-molecular-weight compounds of organic starting place, i.e. proteins, peptides, enzymes, nucleic acids, poly- and oligonucleotides, poly- and oligosaccharides, complicated biopolymers and biooligomers corresponding to viruses, bacteriophages, ribosomes and glycoconjugates, in addition to another compounds similar to immunomodulators. the cloth is contained in components: half A facing basic chromatographic thought, ideas, fabrics and strategies; and half B facing the separation of person compound periods and containing a sign up of chromatographed ingredients and a full-title bibliography. not just is that this a really expert, precise treatise on chromatographic thoughts, it additionally offers a wide, balanced overview of speedy separation of all identified vital biopolymers and biooligomers, either uncomplicated and intricate, and in addition of a few synthetically ready and pharmaceutically very important biooligomers. moreover, it offers an advent to the applying of HPLC to the learn of the constitution of those elements.
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Additional info for Chemical Methods in Gas Chromatography
In conclusion, we shall consider the application of CFD methods in which the derivatives formed are not analysed directly. We shall first examine the reaction chromatographic method in which the derivatives formed are not analysed and the reaction is assessed by the variation of the concentration of the sample compounds in one of two phases that are in equilibrium. This combined distribution- chromatographic method makes it possible to measure quantitatively the contents of components in a common unresolved peak.
INTRODUCTION 19 of analytical reaction GC, known as pyrolysis-GC (see Chapter 3). , refs. 35 and 36). One of the main disadvantages of pyrolysis-gas chromatography (PyGC) is the complexity of the pyrolytic reactions, which proceed in various directions; this hinders the establishment of the structure of the sample compound in the presence of the products of its pyrolysis. , the polymer sample, is therefore a more informative and simpler method. For the directionally controlled destruction of involatile organic compounds reagents are used that ensure the selective separation of the whole compound into its component parts.
When a labelled compound of the same chemical structure is used as the internal standard) this requirement is not compulsory; (4) rate of the reaction (a high rate allows one to reduce the reaction time); ( 5 ) simplicity of realization of the reaction; the derivatives can be obtained both outside and inside the chromatographic system; (6) role of secondary reactions (it must be reduced to a minimum, especially when complex mixtures and impurities are being analysed); and (7) polarity of the derivatives (in many instances, especially in the analysis of high-boiling compounds, it is desirable that the derivatives obtained be weakly polar compounds, which simplifies their subsequent chromatographic analysis).
Chemical Methods in Gas Chromatography by V. G. Berezkin