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Application of principal components analysis to 1H-NMR data obtained from propolis samples of different geographical origin

Watson, D.G. and Peyfoon, E. and Zheng, L. and Lu, D. and Seidel, V.P.M. and Johnston, B. and Parkinson, J.A. and Fearnley, J. (2006) Application of principal components analysis to 1H-NMR data obtained from propolis samples of different geographical origin. Phytochemical Analysis, 17. pp. 323-331. ISSN 0958-0344

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Abstract

Propolis is a widely used natural remedy and a range of biological activities have been attributed to it. The chemical composition of propolis is highly variable and its quality is often controlled on the basis of one or two marker compounds. In order to progress towards a method for the quality control of this complex material, HPLC and 1H-NMR approaches as methods of quality control have been compared. HPLC analyses of 43 samples of propolis were carried out and six marker compounds were quantified in each sample. The same samples were analysed using 1H-NMR and the spectra were then converted into their first derivative forms and digitised using the software application MestRe-C. The digitised data were subjected to principal component analysis using the software application Simca-P. It was found that the chemical composition of propolis mapped well according to the geographical origins of the samples studied when the first three principal components were used to display them. In addition, each sample was assessed for anti-oxidant activity, and the results were then overlaid onto the sample groupings according to 1H-NMR data. It was observed that anti-oxidant properties also mapped quite well according to geographical origin.

Item type: Article
ID code: 10595
Keywords: propolis, anti-oxidant properties, HPLC, nuclear magnetic resonance spectroscopy, Pharmacy and materia medica
Subjects: Medicine > Pharmacy and materia medica
Department: Faculty of Science > Strathclyde Institute of Pharmacy and Biomedical Sciences
Unknown Department
Faculty of Science > Pure and Applied Chemistry
Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 29 Nov 2011 10:49
    Last modified: 12 Mar 2012 10:53
    URI: http://strathprints.strath.ac.uk/id/eprint/10595

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