Determination of hyperin in seed of Cuscuta chinensis Lam. by enhanced chemiluminescence of CdTe quantum dots on calcein/K₃Fe(CN)₆ system

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• 作者：Jing Kang ; Xuwen Li ; Jiayang Geng ; Lu Han ; Jieli Tang ; Yongri Jin ; Yihua Zhang ; ^{yihuazh47@yahoo.com.cn}
• 关键词：Chemiluminescence ; CdTe quantum dots ; Polyphenols ; Seed of Cuscuta chinensis Lam.
• 刊名：Food Chemistry
• 出版年：2012
• 期刊代码：48_03088146
• 类别：abs
• 出版时间：15 October, 2012
• 卷：134
• 期：4
• 页码：2383-2388
• 文件大小：320 K

摘要

In this paper, 3-mercaptocarboxylic acid (MPA) modified CdTe quantum dots (QDs) were used as sensitizers, to enhance the chemiluminescence (CL) of the calcein/K₃Fe(CN)₆ system. A new CL system of CdTe/calcein/K₃Fe(CN)₆ was developed. The effects of reactant concentrations and the particle sizes of CdTe QDs on the CL emission were investigated in detail. The possible enhancement mechanism of the CL was also further investigated based on the photoluminescence (PL) and CL spectra. Polyphenols such as chlorogenic acid, quercetin, hyperin, catechin and kaempferol, were observed to inhibit the CL signal of the CdTe/calcein/K₃Fe(CN)₆ system and determined by the proposed method. The proposed method was applied to the determination of hyperin in seed of Cuscuta chinensis Lam. and the results obtained were satisfactory.