Nauka Przyroda Technologie

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2015 volume 9 issue 1, #9 DOI: 10.17306/J.NPT.2015.1.9
Joanna Kobus-Cisowska, Ewa Flaczyk, Aleksander Siger, Dominik Kmiecik
Effect of the extraction process on yield and composition of selected extracts from maidenhair tree green and yellow leaves
Summary.

The aim of the study was to evaluate the effect of extraction process on the extraction efficiency and composition of selected extracts from the maidenhair tree (Ginkgo biloba L.) green and yellow leaves. Taken three-step extraction, where water, solution of acetone and water and ethyl alcohol were used, effectiveness by evaluating the content of total polyphenols was estimated. In the next step yield of selected extraction processes was estimated, then UV spectra of the obtained extracts and their content of phenolic acids. The content of phenolic compounds in the following extracts showed high efficiency of the first extraction process. Analysis of UV spectra allowed to deduce the presence of phenolic compounds in all tested extracts. The absorption maxima were recorded at wavelengths between 290 nm and 350 nm. Analysed extracts showed high content of phenolic acids. The largest of the sum of phenolic acids was estimated in the acetone-water extract from green leaves and in water extract from yellow leaves. In green leaves extracts the predominant acid was protocatechuic, while in yellow leaves extracts the greatest amount of p-hydroxybenzoic acid was shown.

Key words: antioxidants, maidenhair tree, phenolic acids, extracts spectra, polyphenols
PDFFull text available in Polish in Adobe Acrobat format:
http://www.npt.up-poznan.net/tom9/zeszyt1/art_9.pdf

DOI: 10.17306/J.NPT.2015.1.9

For citation:

MLA Kobus-Cisowska, Joanna, et al. "Wpływ warunków ekstrakcji na wydajność i skład wybranych ekstraktów z liści zielonych i żółtych miłorzębu dwuklapowego." Nauka Przyr. Technol. 9.1 (2015): #9. DOI: 10.17306/J.NPT.2015.1.9
APA Joanna Kobus-Cisowska1, Ewa Flaczyk1, Aleksander Siger2, Dominik Kmiecik1 (2015). Wpływ warunków ekstrakcji na wydajność i skład wybranych ekstraktów z liści zielonych i żółtych miłorzębu dwuklapowego. Nauka Przyr. Technol. 9 (1), #9 DOI: 10.17306/J.NPT.2015.1.9
ISO 690 KOBUS-CISOWSKA, Joanna, et al. Wpływ warunków ekstrakcji na wydajność i skład wybranych ekstraktów z liści zielonych i żółtych miłorzębu dwuklapowego. Nauka Przyr. Technol., 2015, 9.1: #9. DOI: 10.17306/J.NPT.2015.1.9
Corresponding address:
Joanna Kobus-Cisowska
Katedra Technologii Żywienia Człowieka
Uniwersytet Przyrodniczy w Poznaniu
ul. Wojska Polskiego 31/33
60-624 Poznań
Poland

e-mail: joannak@up.poznan.pl
Accepted for print: 14.10.2014