Study of the extraction of proanthocyanidins from grape seeds

Pekić, B.; Kovač, V.; Alonso, E.; Revilla, E.

doi:10.1016/s0308-8146(97)00128-3

Cited by 96 publications

(74 citation statements)

References 8 publications

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“…At 100% acetone the level was greater than for 100% water, and greater than the amount extracted in 50% ethanol. These observations were consistent with previously published research on total tannin extraction in ethanol and acetone (Kallithraka et al, 1995;Pekic et al, 1998;Harbertson & Downey, 2009). …”

Section: Total Tanninsupporting

confidence: 93%

“…A number of extraction solvents have been trialled, including ethanol, methanol, acetone, n-butanol, diethyl ether, ethyl acetate and aqueous and/or acidified mixtures (Hagerman, 1988;Kantz & Singleton, 1990;Alonso et al, 1991;Kallithraka et al, 1995;Pekic et al, 1998;Kelm et al, 2006). Numerous reports comparing a range of different extraction solvents populate the published literature (Alonso et al, 1991;Kallithraka et al, 1995;Pekic et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

“…Numerous reports comparing a range of different extraction solvents populate the published literature (Alonso et al, 1991;Kallithraka et al, 1995;Pekic et al, 1998). However, much of the published research has only examined selected solvent mixtures rather than the full range of possible mixtures (Alonso et al, 1991;Kallithraka et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

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Comparison of Ethanol and Acetone Mixtures for Extraction of Condensed Tannin from Grape Skin

Downey¹,

Hanlin²

2016

SAJEV

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Discrepancies in condensed tannin concentrations in grape skin determined by different analytical methods prompted the closer examination of aspects of the methodologies. One of these was the choice of extraction solvent. Condensed tannins were extracted from Shiraz grape skins using a range of aqueous solvent mixtures ranging from zero to 100% acetone and ethanol to examine the relative effectiveness of each solvent mixture and to determine whether different solvent mixtures extracted similar condensed tannin components. Acetone extracted more condensed tannin than ethanol. Mixtures of 50 to 70% acetone were equally effective. The most effective ethanol concentration was 50%. Epicatechin-gallate terminal subunits were not detected by HPLC following acid-catalysed cleavage in any of the extraction solvents. Extension subunit composition was similar between solvents across most mixtures. Polymers were generally shorter in the ethanol extracts than in the acetone extracts. Despite differences in tannin concentration and polymer length, the subunit composition was similar in 50% ethanol and 70% acetone. More tannin and tannins with longer polymer lengths were extracted with 70% acetone than with 50% ethanol. This suggests that all grape skin tannins are similar in composition, varying only in length. Thus, 50% ethanol and 70% acetone would give a fair indication of the grape skin tannin composition extracted into wine. However, both 50% ethanol and 70% acetone may overestimate the amount of tannin that is extracted into wine, as wine typically has a much lower solvent concentration, ranging between 10 and 15% ethanol.

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Section: Total Tanninsupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comparison of Ethanol and Acetone Mixtures for Extraction of Condensed Tannin from Grape Skin

Downey¹,

Hanlin²

2016

SAJEV

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“…Different solvents have been used for the extraction for proanthocyanidins and a low degree of flavan-3-ols, principally methanol, acetone, ethanol, ethyl acetate, and their aqueous solutions (Pekic et al, 1998). Some studies have reported that methanol and aqueous methanol are the most common solvents for extracting a low degree of flavan-3-ols.…”

Section: Resultsmentioning

confidence: 99%

“…In this study, the aqueous acetone solutions (70% and 50%) were the most effective solvents for the extraction of dimeric proanthocyanidins (proanthocyanidin B1 and B2) as well as catechin and its derivatives. Although ethyl acetate is reported to be a selective solvent for the extraction of a low degree of flavan-3-ols, it is generally used for purification in the solvent partition step of the extraction of these compounds (Spigno et al, 2007;Pekic et al, 1998). Ethanol and its aqueous solutions are other commonly used solvent systems for the extraction of polyphenols.…”

Section: Resultsmentioning

confidence: 99%

Accelerated Solvent Extraction of Flavan-3-OL Derivatives from Grape Seeds

Bozan

Altinay

2014

FSTR

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Grape seeds are one of the major sources of polyphenols, particularly flavan-3-ols and proanthocyanidins, which have been shown to act as strong antioxidants and exert health-promoting effects (Dai and Russell, 2010). Flavan-3-ols are mainly represented by (+)-catechin, ( _ )-epicatechin and ( _ )-epicatechin-3-O-gallate. Among the proanthocyanidin, the dimers (dimer B1 and B2) are usually most abundant compounds in seeds (Prieur et al., 1994).Sample preparation is a primary and critical aspect of flavan-3-ol analysis. Conventional solvent extraction is the initial step in the processing of plant extracts rich in phenolic compounds prior to analysis. However, the conventional extraction methods used to obtain these types of products have several drawbacks. They are time-consuming, laborious, and exhibit low selectivity and/or extraction yields; moreover, they usually employ large amounts of Ju and Howard, 2003).Therefore, in the present study, the ASE method was applied for the extraction of flavan-3-ols from grape seed to investigate the effects of extraction parameters (solvent type, temperature, average particle size, static extraction time, and number of extractions) on the extraction efficiency of flavan-3-ol derivatives. Original paper Accelerated Solvent Extraction of Flavan-3-OL Derivatives from Grape SeedsBerrin Bozan * and R. Cigdem altinay

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Tannins: A Resource to Elaborate Aromatic and Biobased Polymers

Arbenz

Avérous

2016

Biodegradable and Biobased Polymers for Environmental and Biomedical Applications

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Study of the extraction of proanthocyanidins from grape seeds

Cited by 96 publications

References 8 publications

Comparison of Ethanol and Acetone Mixtures for Extraction of Condensed Tannin from Grape Skin

Comparison of Ethanol and Acetone Mixtures for Extraction of Condensed Tannin from Grape Skin

Accelerated Solvent Extraction of Flavan-3-OL Derivatives from Grape Seeds

Tannins: A Resource to Elaborate Aromatic and Biobased Polymers

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