Electrochemical Behavior of Luteolin and Application to Its Determination
摘 要
对木犀草素在单纯水溶液介质中的电化学行为作了研究.结果表明:在pH 4.0的B-R缓冲溶液作底液的条件下,得到峰形对称的木犀草素的可逆氧化还原峰.循环伏安法(CV)试验结果表明:其在玻碳电极表面的电极反应受吸附所控制.用积分脉冲伏安法(DPV)研究了氧化峰电流(ipa)与木犀草素浓度(cLu)之间的关系,结果表明:木犀草素浓度在8.0×10-8~8.0×10-6mol·L-1之间呈线性关系,检出限(3S/N)为7.14×10-8mol·L-1,回收率在98.5%~104.0%之间.用线性扫描伏安当(LSV)试验表明:当cLu为4.14×10-5mol·L-1时,ipa达到最大值.据此按公式Q=nFAΓT可算出饱和吸附量ΓT为6.21×10-10mol·cm-2.根据Laviron原理和Langmuir吸附等温式可算出如下电极过程热力学参数,参与氧化还原过程的电子数n=2,电极反应质子数=2,转移系数a=0.90,表现电子传递速率常数ks=2.96 s-1,对电极反应的机理也作了简要讨论.
Abstract
Electrochemical behavior of luteolin in an unitary aqueous medium was studied.It was found that a reversible and well-shaped symmetrical redox peak of luteolin was obtained in a base solution of B-R buffer of pH 4.0.As shown by the results of CV study,the electrode reaction of luteolin on the surface of the glassy carbon electrode was controlled by adsorption.The relationship between anodic peak current ipa and concentration of luteolin cLu as studied by DPV,was found in the range of 8.0×10-8-8.0×10-6mol·L-1,with detection limit (3S/N) of 7.14×10-8mol·L-1,and recovery in the range of 98.5%-104.0%.Value of ipa attained to a maximum when cLu was 4.14×10-5mol·L-1 (as tested by LSV),and the max.adsorption coverage ΓT of 6.21×10-10mol·cm-2 was found by the formula Q=nFAΓT.Based on the principle of Laviron and the Langmuir isothermal adsorption equation,the following dynamic parameters of the electrode process are found: n=2,=2,a=0.90 and ks=2.96 s-1.A brief discussion on the mechanism of the electrode reaction was also given.
中图分类号 O657.1
所属栏目 工作简报
基金项目 河南省创新人才基金资助项目(0421002300);河南省杰出人才基金资助项目(0512001400)
收稿日期 2009/1/7
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引用该论文: QU Ling-bo,ZHAO Jun-hong,YANG Ran,LI Jian-jun. Electrochemical Behavior of Luteolin and Application to Its Determination[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2010, 46(3): 313~316
屈凌波,赵俊宏,杨冉,李建军. 木犀草素的电化学性质及在其测定中的应用[J]. 理化检验-化学分册, 2010, 46(3): 313~316
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【3】张伟敏,张盛林,钟耕.木犀草素的研究概况[J].中国食品添加剂,2005,12:11-13.
【4】KATARNA H A,IVAN C,LVIA S A.Protective effect of quercetin and luteolin in human melanoma HMB-2 cells[J].Mutation Research,2005,565:105-112.
【5】吕元琦,邬春华,袁倬斌.毛细管电泳法测定密蒙花中的橙皮素、木犀草素和芹菜素[J].分析试验室,2004,23(8):14-16.
【6】王月伶,吕元琦,袁倬斌,等.毛细管区带电泳法测定芹菜素木犀草素和异槲皮甙[J].理化检验-化学分册,2005,41(8):544-546.
【7】杨更亮,宋秀荣,张红医,等.用胶束毛细管电泳法测定清开灵注射液中的有效成分[J].河北大学学报:自然科学版,1998,18(4):359-360.
【8】汪海峰,曹锡忠,杨慧萍,等.花生壳甲醇提取物中木犀草素的分离与鉴定研究[J].中国粮油学报,1997,12(3):48-50.
【9】阎高峰,叶小利,袁吕江,等.天然抗氧化剂木犀草素抗氧化活性的研究[J].食品和发酵工业,2005,31(8):27-29.
【10】屈凌波,王玲,杨冉.木犀草素、芹菜素与牛血清白蛋白相互作用的研究[J].药学学报,2006,41(4):352-357.
【11】武冬梅,李敬芬.木犀草素-Cu(Ⅱ)配合物修饰碳糊电极的电化学性质研[J].黑龙江医药科学,2004,27(6):13-15.
【12】武冬梅,李敬芬,张楠楠.酸度对木犀草素-Cu(Ⅱ)修饰碳糊电极的电化学性质的影响[J].黑龙江医药科学,2004,27(5):11-13.
【13】武冬梅,李敬芬.木犀草素修饰碳糊电极的电化学性质研究[J].黑龙江医药科学,2005,28(3):11-13.
【14】栾积毅,李敬芬,沙靖全,等.木犀草素在非水溶剂中的电化学性质[J].黑龙江医药科学,2003,26(6):52-53.
【15】LAVIRON E.General expression of the linear potential sweep voltammogram in the case of diffusionless electrochemical systems[J].J Electroanal Chem,1979,101(1):19-28.
【16】张祖训,汪尔康.电化学原理和方法[M].北京:科学出版社,2000:439-440.
【17】DRYHURST G,KADISH K M,SCHELLER F.Biological electrochemistry[M].New York: Academic Press,1982:256-277.
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