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Tissue Homogenization and Cell Lysis01:32

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Related Experiment Video

Updated: Jun 25, 2026

Employing Pressurized Hot Water Extraction (PHWE) to Explore Natural Products Chemistry in the Undergraduate Laboratory
09:48

Employing Pressurized Hot Water Extraction (PHWE) to Explore Natural Products Chemistry in the Undergraduate Laboratory

Published on: November 7, 2018

Optimization of the sonication extraction method of Hibiscus tiliaceus L. flowers.

Maria Inês Soares Melecchi1, Valéria Flores Péres, Cláudio Dariva

  • 1Chemistry Institute, UFRGS, Porto Alegre, RS, av. Bento Gonçalves, 9500, CEP 91501-960, RS, Brazil.

Ultrasonics Sonochemistry
|July 5, 2005
PubMed
Summary

Ultrasonic extraction of Hibiscus tiliaceus flowers was optimized by adjusting time and solvent polarity. This method efficiently yielded compounds like fatty acids and vitamin E from the plant.

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Area of Science:

  • Phytochemistry
  • Natural Product Extraction
  • Analytical Chemistry

Background:

  • Hibiscus tiliaceus L. is a plant with potential medicinal properties.
  • Efficient extraction methods are crucial for isolating bioactive compounds.
  • Ultrasonic extraction offers advantages in terms of speed and efficiency.

Purpose of the Study:

  • To investigate and optimize experimental parameters for ultrasonic extraction of Hibiscus tiliaceus L. flowers.
  • To identify the key factors influencing the extraction efficiency.
  • To characterize the chemical constituents present in the optimized extracts.

Main Methods:

  • Systematic investigation of parameters: extraction time, solvent polarity, sample amount, solvent volume, and particle size.
  • Optimization of the ultrasonic extraction process.
  • Fractionation of extracts using preparative silica gel column chromatography.
  • Analysis of fractions using Gas Chromatography-Mass Spectrometry (GC/MS).

Main Results:

  • Extraction time and solvent polarity were identified as the most significant parameters influencing the extraction yield.
  • Optimized conditions involved 5 g of ground flowers, 150 mL of methanol, and 140 minutes of extraction.
  • GC/MS analysis revealed the presence of saturated hydrocarbons, fatty acids, fatty acid methyl esters, phytosterols, and vitamin E in the extracts.

Conclusions:

  • Ultrasonic extraction is an effective method for isolating compounds from Hibiscus tiliaceus L. flowers.
  • Optimized extraction parameters significantly enhance the yield and profile of extracted compounds.
  • The identified compounds, including phytosterols and vitamin E, suggest potential applications for Hibiscus tiliaceus extracts.