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Chemical and Biochemical Engineering Quarterly, Vol. 25 No. 4, 2011.

Original scientific paper

Application of the Nanofiltration Process for Concentration of Polyphenolic Compounds from Geranium robertianum and Salvia officinalis Extracts

G. Paun ; National Institute for Research-Development of Biological Sciences – Centre of Bioanalysis, 296 Spl.Independentei, PO Box 17-16, 060031, Bucharest 6, Romania
E. Neagu ; National Institute for Research-Development of Biological Sciences – Centre of Bioanalysis, 296 Spl.Independentei, PO Box 17-16, 060031, Bucharest 6, Romania
A. Tache ; National Institute for Research-Development of Biological Sciences – Centre of Bioanalysis, 296 Spl.Independentei, PO Box 17-16, 060031, Bucharest 6, Romania
G. L. Radu ; Politehnica University of Bucharest, Faculty of Applied Chemistry and Materials Science, 313 Spl.Independentei, 060042, Bucharest, Romania
V. Parvulescu ; Institute of Physical Chemistry, Splaiul Independetei 202, 060021 Bucharest, Romania

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Abstract

The aim of this study was to prove the efficiency of the nanofiltration process for the concentration of polyphenolic compounds from Geranium robertianum and Salvia officinalis extracts and to evaluate the extract’s antioxidant activity. A lab-scale cross-flow set-up using flat-sheet configuration membrane was employed for all experiments.
Two nanofiltration membranes have been used: SelRO MPF-36 (Koch membrane) and an organic-inorganic membrane (polysulfone with SBA-15-NH2). When the organic-inorganic membranes were used in the nanofiltration process, the obtained concentrated extracts proved to have higher polyphenol and flavonoid rejections, in both cases (Geranium robertianum and Salvia officinalis). The obtained values were over 88 % DPPH inhibition, for concentrated extracts, using the DPPH method. The concentrated extracts obtained after nanofiltration NF2 (organic-inorganic membrane) had the strongest scavenging activity for all extracts and almost completely inhibited DPPH absorption (92.9 % for Geranium robertianum concentrated extract and 90.1 % for Salvia officinalis concentrated extract). These features turn the studied, concentrated extracts into a good source for further medicinal applications.

Keywords

Geranium robertianum; Salvia officinalis; ultrafiltration; nanofiltration; organic-inorganic membrane

Hrčak ID:

76438

URI

https://hrcak.srce.hr/76438

Publication date:

22.1.2012.

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