Recently the impregnation of thin-layer plates with different substances has been tried in order to improve the separation of various classes of substances. Yasudal-J reported the use of different metal salts for the separation of aromatic amines, while Srivastava and Dua, in this laboratory, have d
Separation of penicillins of closely related structure by partition chromatography on paper and cellulose thin-layer plates
β Scribed by S.C. Pan
- Publisher
- Elsevier Science
- Year
- 1973
- Tongue
- English
- Weight
- 428 KB
- Volume
- 79
- Category
- Article
- ISSN
- 1873-3778
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β¦ Synopsis
By applying the technique of real partition chromatography
to systems in which aqueous buffer solutions are used as the stationary phase, natural or semisynthetic penicillins of closely related structure can be satisfactorily separated. Water-saturated alkanols of proper polarity and buffers of proper pH are chosen as the mobile and stationary phases, respectively, according to the polarity of the penicillin to be chromatographed.
Examples of penicillins separated are ampicillin vs. epicillin, their N-acetyl derivatives, penicillins G vs. penicillin V, ?IZ-vs. p-hydroxybenzylpenicillins and I~Z-vs. fi-hydroxyampicillins,
π SIMILAR VOLUMES
In this paper, which is a continuation of previous work (Part VI), two series of dipepticles, one with leucine and the other with isoleucine as the N-terminal residue, have been examined by both ion-exchange and thin-layer chromatography. The possibility of identifying these compounds in biological