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Planta Med 1980; 40(9): 12-21
DOI: 10.1055/s-2008-1074937
Research Articles

© Georg Thieme Verlag Stuttgart · New York

Extraktion labiler Naturstoffe mit überkritischen Gasen

3. Mitt.: Pyrethrum-Extrakte mit flüssigem und überkritischem KohlendioxidExtraction of Natural Compounds with Supercritical Gases3. Comm.: Pyrethrum Extracts with Liquefied and Supercritical Carbon DioxideEgon Stahl, Erwin Schütz
  • Pharmakognosie und Analytische Phytochemie der Universität des Saarlandes, D-6600 Saarbrücken, Bundesrepublik Deutschland
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Publication History

Publication Date:
29 April 2008 (online)

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Abstract

Pyrethrum flowers are extracted with supercritical and liquefied carbon dioxide. In the pressure region of 100 bar, yields of total pyrethrins obtained with liquefied carbon dioxide are slightly higher than those obtained with supercritical gases; in the extract, the content of pyrethrins is substantially higher (up to 50 %) than in commercially available petroleum ether extracts. Precipitation in two steps enriches the active ingredients to over 60 %. In the temperature region between 20 and 40°, there is no decomposition of the pyrethrins which are thermally instable.

Key Word Index

Chrysanthemum cinerariaefolium - Compositae - Pyrethrum Flowers - Pyrethrins - Supercritical Gases - Extraction - Carbon Dioxide.