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Article: Hydrolysis kinetics of astaxanthin esters and stability of astaxanthin of Haematococcus pluvialis during saponification

TitleHydrolysis kinetics of astaxanthin esters and stability of astaxanthin of Haematococcus pluvialis during saponification
Authors
KeywordsAstaxanthin
Astaxanthin esters
Carotenoids
Haematococcus pluvialis
Hydrolysis
Kinetics
Stability
Issue Date1999
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/jafcau
Citation
Journal Of Agricultural And Food Chemistry, 1999, v. 47 n. 1, p. 31-35 How to Cite?
AbstractThe reaction kinetics for the hydrolysis of astaxanthin esters and the degradation of astaxanthin during saponification of the pigment extract from the microalga Haematococcus pluvialis were investigated. Different concentrations of sodium hydroxide in methanol were used for the saponification under nitrogen in darkness at ambient temperature (22 °C) followed by the analysis of astaxanthins and other carotenoids using an HPLC method. The concentration of methanolic NaOH solution was important for promoting the hydrolysis of astaxanthin esters and minimizing the degradation of astaxanthin during saponification. With a higher concentration of methanolic NaOH solution, the reaction rate of hydrolysis was high, but the degradation of astaxanthin occurred significantly. The rate constants of the hydrolysis reaction (first order) of astaxanthin esters and the degradation reaction (zero-order) of astaxanthin were directly proportional to the concentration of sodium hydroxide in the saponified solution. Although the concentration of sodium hydroxide in the saponified solution was 0.018 M, complete hydrolysis of astaxanthin esters was achieved in 6 h for different concentrations (10-100 mg/L) of pigment extracts. Results also indicated that a higher temperature should be avoided to minimize the degradation of astaxanthin. In addition, during saponification, no loss of lutein, β- carotene, and canthaxanthin was found.
Persistent Identifierhttp://hdl.handle.net/10722/68659
ISSN
2015 Impact Factor: 2.857
2015 SCImago Journal Rankings: 1.246
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorYuan, JPen_HK
dc.contributor.authorChen, Fen_HK
dc.date.accessioned2010-09-06T06:06:32Z-
dc.date.available2010-09-06T06:06:32Z-
dc.date.issued1999en_HK
dc.identifier.citationJournal Of Agricultural And Food Chemistry, 1999, v. 47 n. 1, p. 31-35en_HK
dc.identifier.issn0021-8561en_HK
dc.identifier.urihttp://hdl.handle.net/10722/68659-
dc.description.abstractThe reaction kinetics for the hydrolysis of astaxanthin esters and the degradation of astaxanthin during saponification of the pigment extract from the microalga Haematococcus pluvialis were investigated. Different concentrations of sodium hydroxide in methanol were used for the saponification under nitrogen in darkness at ambient temperature (22 °C) followed by the analysis of astaxanthins and other carotenoids using an HPLC method. The concentration of methanolic NaOH solution was important for promoting the hydrolysis of astaxanthin esters and minimizing the degradation of astaxanthin during saponification. With a higher concentration of methanolic NaOH solution, the reaction rate of hydrolysis was high, but the degradation of astaxanthin occurred significantly. The rate constants of the hydrolysis reaction (first order) of astaxanthin esters and the degradation reaction (zero-order) of astaxanthin were directly proportional to the concentration of sodium hydroxide in the saponified solution. Although the concentration of sodium hydroxide in the saponified solution was 0.018 M, complete hydrolysis of astaxanthin esters was achieved in 6 h for different concentrations (10-100 mg/L) of pigment extracts. Results also indicated that a higher temperature should be avoided to minimize the degradation of astaxanthin. In addition, during saponification, no loss of lutein, β- carotene, and canthaxanthin was found.en_HK
dc.languageengen_HK
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/jafcauen_HK
dc.relation.ispartofJournal of Agricultural and Food Chemistryen_HK
dc.subjectAstaxanthinen_HK
dc.subjectAstaxanthin estersen_HK
dc.subjectCarotenoidsen_HK
dc.subjectHaematococcus pluvialisen_HK
dc.subjectHydrolysisen_HK
dc.subjectKineticsen_HK
dc.subjectStabilityen_HK
dc.titleHydrolysis kinetics of astaxanthin esters and stability of astaxanthin of Haematococcus pluvialis during saponificationen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0021-8561&volume=47&issue=1&spage=31&epage=35&date=1999&atitle=Hydrolysis+kinetics+of+astaxanthin+esters+and+stability+of+astaxanthin+of+Haematococcus+pluvialis+during+saponificationen_HK
dc.identifier.emailChen, F: sfchen@hku.hken_HK
dc.identifier.authorityChen, F=rp00672en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1021/jf980465xen_HK
dc.identifier.pmid10563844-
dc.identifier.scopuseid_2-s2.0-0032900727en_HK
dc.identifier.hkuros45430en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0032900727&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume47en_HK
dc.identifier.issue1en_HK
dc.identifier.spage31en_HK
dc.identifier.epage35en_HK
dc.identifier.isiWOS:000078136200006-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridYuan, JP=7403401467en_HK
dc.identifier.scopusauthoridChen, F=7404907980en_HK

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