Alvaro Viljoen

Hyperspectral imaging in combination with chemometric data analysis – a powerful duo in the quality control of herbal medicines

Ilze Vermaak, Sidonie Tankeu, Majolie Djokam, 2019 .

Special Issue — Quality control

Ilze Vermaak, Alvaro Viljoen, I. Vermaak, 2012 .

Looks may be deceiving – Exposing taxonomic similarity through chemometric modeling of analytical data

Ilze Vermaak, Maxleene Sandasi, Weiyang Chen, 2014 .

A chemotaxonomic assessment of four indigenous South African Lippia species using GC–MS and vibrational spectroscopy of the essential oils

Maxleene Sandasi, Alvaro Viljoen, M. Sandasi, 2013 .

Hyperspectral imaging in the quality control of herbal medicines - the case of neurotoxic Japanese star anise.

Ilze Vermaak, Alvaro Viljoen, Susanne Wiklund Lindström, 2013, Journal of pharmaceutical and biomedical analysis.

Differentiation between two "fang ji" herbal medicines, Stephania tetrandra and the nephrotoxic Aristolochia fangchi, using hyperspectral imaging.

Ilze Vermaak, Sidonie Tankeu, Maxleene Sandasi, 2016, Phytochemistry.

Fourier transform near- and mid-infrared spectroscopy can distinguish between the commercially important Pelargonium sidoides and its close taxonomic ally P. reniforme

Alvaro Viljoen, A. Viljoen, J. E. Maree, 2011 .

Chemistry of Aloe Species

Alvaro Viljoen, Daniel Bisrat, D. Bisrat, 2000 .

Hyperspectral Imaging as a Rapid Quality Control Method for Herbal Tea Blends

Ilze Vermaak, Majolie Djokam, Maxleene Sandasi, 2017 .

The Application of Vibrational Spectroscopy Techniques in the Qualitative Assessment of Material Traded as Ginseng

Ilze Vermaak, Maxleene Sandasi, Alvaro Viljoen, 2016, Molecules.