Supercritical fluid extraction of flavonoids from Scutellariae Radix

Lin, Mei-Chih; Tsai, Ming-Jer; Wen, Kuo‐Ching

doi:10.1016/s0021-9673(98)00906-6

Cited by 126 publications

(65 citation statements)

References 11 publications

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“…Fig.1 shows an increase of ethanol percentage up to 50% resulted in an increase of flavonoids recovery. This was consistent with the results of Lin et al(1999) that under certain temperature and pressure, the higher the percentage of modifiers, the higher was the extraction yield achieved. However, ethanol above 50% exhibited a tremendous drop in flavonoids yield.…”

Section: Effect Of the Amount Of Ethanol Added On The Yield Of Flavonsupporting

confidence: 92%

Optimization of conditions for supercritical fluid extraction of flavonoids from hops (Humulus lupulusL.)

Hao-ping

Chen

et al. 2005

J. Zhejiang Univ. Sci.

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Waste hops are good sources of flavonoids. Extraction of flavonoids from waste hops (SC-CO 2 extracted hops) using supercritical fluids technology was investigated. Various temperatures, pressures and concentrations of ethanol (modifier) and the ratio (w/w) of solvent to material were tested in this study. The results of single factor and orthogonal experiments showed that at 50 °C, 25 MPa, the ratio of solvent to material (50%), ethanol concentration (80%) resulted in maximum extraction yield flavonoids (7.8 mg/g). HPLC-MS analysis of the extracts indicated that flavonoids obtained were xanthohumol, the principal prenylflavonoid in hops.

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Section: Effect Of the Amount Of Ethanol Added On The Yield Of Flavonsupporting

confidence: 92%

Optimization of conditions for supercritical fluid extraction of flavonoids from hops (Humulus lupulusL.)

Hao-ping

Chen

et al. 2005

J. Zhejiang Univ. Sci.

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“…Higher content of flavonoids in seaweeds were also reported from other places [24][25] . The flavonoid content of Ulva lactuca and Sargassum whitii and Enteromorpha spirulina was reported to be relatively low.…”

Section: Fig 5: Hplc Chromatogram Of Ethanolic Extract Of Gc Spiked supporting

confidence: 73%

Untitled

2017

IJPSR

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ABSTRACT:To investigate the content of polar auxin transport inhibitor flavonoid quercetin (Q) and topo-isomerase I-DNA inhibitor alkaloid camptothecin (CPT) from Gracilaria corticata (GC), red seaweed from Surathkal beach, Karnataka a comparative study was carried out. Methods: The content of Q and CPT was quantified in the ethanolic extract of GC using thin layer chromatography (TLC) and high performance liquid chromatography (HPLC). The HPLC analysis resulted in a sharp peak of authentic CPT and Q at the retention time of 2.445 min and 3.540 min respectively. The peaks of ethanolic extract of GC spiked with CPT was found at the retention time of 1.630 min, 1.690 min and 2.000 min and retention time in the ethanolic extract of GC spiked with Q was found to be 1.600 min and 1.713 min. The method developed for this study shall stand appropriate for the quantification of secondary metabolites and screening of flavonoid and alkaloid contents in the seaweeds.

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“…The solvating power of a supercritical fluid is varied and extraction efficiency is markedly improved by controlling the pressure or by adding organic modifiers, such as methanol. In the SFE of flavonoids from Scutellaria radix, Lin et al observed that, for 1 g of sample, adding 3 mL of 70% methanol in 20 mL of CO 2 gave much better extraction than pure methanol [62]. This might be because 30% of water would further increase the polarity of the modifier, and polar constituents would thus be extracted more easily.…”

Section: Extractionmentioning

confidence: 99%

Extraction, separation, and detection methods for phenolic acids and flavonoids

Stalikas¹

2007

J of Separation Science

853

539

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ReviewExtraction, separation, and detection methods for phenolic acids and flavonoidsThe impetus for developing analytical methods for phenolic compounds in natural products has proved to be multifaceted. Hundreds of publications on the analysis of this category of compounds have appeared over the past two decades. Traditional and more advanced techniques have come to prominence for sample preparation, separation, detection, and identification. This review provides an updated and extensive overview of methods and their applications in natural product matrices and samples of biological origin. In addition, it critically appraises recent developments and trends, and provides selected representative bibliographic examples.

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Supercritical fluid extraction of flavonoids from Scutellariae Radix

Cited by 126 publications

References 11 publications

Optimization of conditions for supercritical fluid extraction of flavonoids from hops (Humulus lupulusL.)

Optimization of conditions for supercritical fluid extraction of flavonoids from hops (Humulus lupulusL.)

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Extraction, separation, and detection methods for phenolic acids and flavonoids

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