Concentration and formulation of elderberry (Sambucus Nigra L.) anthocyanins using membrane process and PGSS™ technology

Zs Molnár, Á Hesz, Sz Bánvölgyl, M. Škerget, Ž Knez, Gy Vatai

Research output: Contribution to conferencePaper

Abstract

The elderberry (Sambucus nigra L.) juice is rich in anthocyanins which are valuable materials for human organism, therefore it is important to save it during the processing of the elderberry. In this study two novel technologies were applied to concentrate anthocyanins. At first mild concentration of elderberry juice by membrane-filtration was the aim of our experiments. Removing of suspended solids by ultrafiltration-membrane (UF) was applied like prefiltration. The recycle flow rate and transmembrane pressure difference were kept constant during the measurements. The prefiltrated elderberry juice was concentrated by nanofiltration (NF) flatsheet-membrane and reverse osmosis (RO). The RO retentate (concentrate) was further concentrated by osmotic distillation (OD). In the course of filtration and concentration total soluble solid (TSS) content was measured and total anthocyanin content of samples was determined with analytical method. After the concentration the retentates of filtrations were further formulated using supercritical fluid technology, namely Particles from Gas Saturated Solution (PGSS™). The PGSS™ formulation was carried out using supercritical carbon dioxide, which results in an organic solvent-free product. In process the compressible medium is solubilized in the substance which has to be micronized. The investigated carrier material was glyceryl tristearate. In this method high pressure was applied. After the PGSS™ powderous anthocyanin and glyceryl tristearate containing products were obtained which showed good colour stability, which gives good bases for potential applications in the future. The products are homogenously colured fine powders with colours from light pink to violet, which depends on content of anthocyanin.

Original languageEnglish
Pages589-594
Number of pages6
Publication statusPublished - Dec 1 2009
Event5th International Technical Symposium on Food Processing, Monitoring Technology in Bioprocesses and Food Quality Management - Potsdam, Germany
Duration: Aug 31 2009Sep 2 2009

Other

Other5th International Technical Symposium on Food Processing, Monitoring Technology in Bioprocesses and Food Quality Management
CountryGermany
CityPotsdam
Period8/31/099/2/09

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Keywords

  • Anthocyanin
  • Elderberry
  • Membrane filtration
  • Micronization
  • Supercritical fluid (CO )

ASJC Scopus subject areas

  • Food Science

Cite this

Molnár, Z., Hesz, Á., Bánvölgyl, S., Škerget, M., Knez, Ž., & Vatai, G. (2009). Concentration and formulation of elderberry (Sambucus Nigra L.) anthocyanins using membrane process and PGSS™ technology. 589-594. Paper presented at 5th International Technical Symposium on Food Processing, Monitoring Technology in Bioprocesses and Food Quality Management, Potsdam, Germany.