Publications serve as the concrete art form for the scientist. It is his modus operandi. Authorship is akin to success and achievement. It cannot and should not deteriorate into a bargaining tool or commodity. Dardik
Reza Adhami, H., Viljoen, A.M. 2015. Preparative isolation of bio-markers from the leaf exudate of Aloe ferox (“aloe bitters”) by high performance counter-current chromatography. Phytochemistry Letters 11: 321-325.


One of the most crucial factors determining the safety and efficacy of any herbal medicine or natural product-based formulation is the quality of the raw material. The absence of readily available biomarkers (standards) is one of the hurdles which need to be overcome to develop robust and effective quality control protocols.

Aloe ferox Mill. Is a most coveted ethnomedicinally import plant indigenous to South Africa. Aloe ferox has been used since ancient times in folk medicine and recently it has gained popularity as an ingredient in cosmetic formulations and food supplements. This study aimed to develop a superior method for the isolation of bio-markers from "aloe bitters” (exudate) obtained from A. feroxFor separation by HPCCC the solvent system comprising of EtOAc-BuOH-H2O (3.5:1.5:5, v/v/v) was used in reversed phase mode. By this method, and only in one run, eight bio-markers were separated and isolated on semi-preparative scale including aloesin, aloeresin C, aloeresin A, 5-hydroxyaloin, aloin B, aloinoside B, aloin A and aloinoside A. The isolation of bio-active molecules from Aloe ferox (Cape aloes) is presented to illustrate the efficiency and advantages of high performance counter-current chromatography (HPCCC).



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