RPG Student List


Ka Chun LI

Master Candidate in Chemical and Biomolecular Engineering

Supervisor: Prof. Xijun HU

Co-Supervisor: Prof. Frank Lam


Research Topic

Separation of steviosides via chromatographic approach


The raising consumption of sucrose in recent years brings nutrition and medicinal problems. In order to save lives from them, using sweeteners as substitutes may be possible to achieve this goal. However, people are normally worrying artificial sweeteners may cause cancers or contain some unknown effects to their bodies, so they are looking for some natural sweeteners. Stevia rebaudiana may be a suitable choice for them, which is widely used as species by Japanese because it is natural and non-caloric. There are mainly six components in stevia rebaudiana extracts, which are Rebaudioside A, Rebaudioside B, Rebaudioside C, Stevioside(STV) and Rebaudioside D. Highly purified Rebaudioside A is sweeter than sucrose up to 400 times, and the others components are expected to have similar properties. Adsorption is one of the common separation technique in food industry. Resin is a large member in adsorbent family, each particle of resin contains a lot of pores. The size and charge of the pore and the material of the resin make a large differentiation of resin and give it a large research opportunity.