BLACKCURRANT EXTRACT-黑栗醋萃取物.pdf

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1、BLACKCURRANTEXTRACTPreparedatthe57thJECFA(2001)andpublishedinFNP52Add9(2001),supersedingtentativespecificationspreparedatthe55thJECFA(2000),publishedinFNP52Add8(2000).NoADIwasallocatedatthe30thJECFA(1986)SYNONYMSINSNo.163(iii)DEFINITIONBlackcurrantextractisobtainedfromblackcurrantpomacebyaqu

2、eousextraction.Themaincolouringprinciplesarefouranthocyanins(cyanidin3-rutinoside,delphinidin3-rutinoside,cyanidin3-glucoside,delphinidin3-glucoside).Mostoftheextractedsugarsarefermentedtoalcoholandpracticallyallthealcoholisremovedduringtheconcentrationoffermentedextractbyvacuumevaporation.D

3、uringtheextractionprocess,sulfurdioxideisusedandresidualsulfurdioxidemaybepresent.Commercialproductsmaybeintheformofaconcentratedliquid,apaste,oraspray-driedpowder.Thespray-driedpowdermaycontainanaddedcarriersuchasmaltodextrinorglucosesyrup.ChemicalnamesI.Cyanidin3-rutinosideIII.Cyanidin3-gl

4、ucosideII.Delphinidin3-rutinosideIV.Delphinidin3-glucosideC.A.S.numberI.18719-76-1III.7084-24-4II.15674-58-5IV.6906-38-3ChemicalformulaI.[C+-+-27H31O15]XIII.[C21H21O11]X+-+-II.[C27H31O16]XIV.[C21H21O12]X-WhereX=counterionStructuralformulaI.R1=H,R2=rutinoseII.R1=OH,R2=rutinoseIII.R1=H,R2=gluc

5、oseIV.R1=OH,R2=glucoseAssayThecolourintensityisnotlessthandeclared.DESCRIPTIONPurplish-redliquid,pasteorpowderhavingaslightcharacteristicodour.FUNCTIONALUSESColourCHARACTERISTICSIDENTIFICATIONSolubility(Vol.4)Solubleinwaterandethanol.Spectrometry(Vol.4)AtpH3theabsorbancemaximumisabout520nm.C

6、olourreactionAdd0.1gofthesampleto50mlofwaterandshakethoroughly.Filterifnecessary.Thesolutionshowsredtopurplish-redcolouranditturnstoblueordarkgreenontheadditionofsodiumhydroxideTS.ChromatographyTheretentiontimesforthemajortwopeaksinthechromatogramofsamplesolutioncorrespondtothoseforcyanidin3

7、-rutinosideanddelphinidin3-rutinosideinthechromatogramofreferenceusingtheconditionsdescribedunderTESTS.PURITYSulfurdioxideNotmorethan50mg/kgforeachunitofcolourintensitySeedescriptionunderTESTSandMETHODOFASSAY.BasiccolouringmatterAdd1gofthesampleto1