engleski

Elemental profiling by ICP-AES combined with separation and chemometric tools in botanical origin determination

Characterization of elemental content is basic requirement in quality analysis of food and herbal products as well as in botanical and geographical origin postulations. Inductively coupled plasma source with optical detection (ICP-AES) shows an exclusive advantage in “elemental profiling” due to highly sensitive simultaneous multielement analysis with high precision, large dynamic range and low detection limits. Analytical approaches in fingerprinting which rely on combination of different analytical techniques and with aid of chemometrics is remarkably useful in standardization of food and herbal products as well as in chemotaxonomy of plants. The results of combined analytical methods are presented by two examples. The first includes pollen analysis and multielement analysis of honey samples from Northwestern counties of Croatia. The chemometric interpretation of results provides valuable information regarding quality, authenticity and botanical origin of Croatian continental honey. The second example describes combination of elemental analysis of pyrethrum plant varieties and HPLC separation of natural insecticide extracts of pyrethrins. By applying the multivariate statistical tools some specific assignments of wild and cultivated varieties were established. The information integrated from the inorganic constituents’ level and natural insecticide content provides valuable results for the plant chemotaxonomy purposes.

elemental profiling ; ICP-AES ; chemometric analysis ; botanical origin

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