Flow Injection Chemiluminescence Determination of Puerarin in Pharmaceutical Preparations Using Eosin Y-Fenton System.pdfVIP
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Flow Injection Chemiluminescence Determination of Puerarin in Pharmaceutical Preparations Using Eosin Y-Fenton System.pdf
FULLPAPER
FlowInjectionChemiluminescenceDeterminationofPuerarin
inPharmaceuticalPreparationsUsingEosinY-FentonSystem
cai,Zhuo(蔡卓) Zhang,Xian(张娴) Lu,Dengfeng(卢登峰) Gan,Jingni(甘静妮)
CollegeofChemistryandChemicalEngineering,GuangxiUniversity,Nanning,Guangxi53ooo4,China
A novelchemiluminescence(CL)system wasestablishedforthedeterminationofpuerarininpharmaceutical
preparations.ItwasshownhtatastrongCLsignalwasobservedwhenEosinY reactedwiththehydroxylradicals
whichweregeneratedfrom Fentonreagentinacidicmedium .TheCLintensitywasdecreasedsignificantlywhen
puerarinwasaddedtothereactionsystem andpartiallyscavengedthehydroxylradicalsinhtesolution.Theextent
ofdecreaseintheCLintensityhadagoodstoichiomecricalrelationshipwithpuerarinconcentration.Basedonhtis.
anewmehtodforhtedeterminationofpuerarinusingaflowinjectionchemiluminescencetechniquewasdeveloped.
Theexperimenta1praametersthataffectedtheCLintensitywereoptimized.Underhteoptimalconditions.thelinear
rangeforpuerarinconcentrationwas8.0X10~一2.0X10 mo1/L限=0.9982)withadetectionlimitof7.5X10
mo1/L(S/N:31andhterelativestnadarddeviationwas1.7%for4.0X 10 mol/Lpuerarin =11).Theproposed
mehtodwasappliedtohtedetemr inationofpuerarininapuerarininjectionwithsatisfactoryresults.
Keywords flowinjection,chemiluminescence,EosinY,puerarin,hydroxylradical
lntroduction SchemeI Thestructureofpuerarin
RadixPuerariae(RP),therootofPuerarialobata
(W illd.)Ohwi,isatraditionalChineseherbalmedicine
usedforavariety ofdiseaseprevention andtreatment
purposes.Accumulating evidenceshaverevealed that
O
theextractofRPisrichiniso
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