A highly sensitive coupling technique for the determination of trace quercetin based on solid substrate room temperature phosphorimetry and poly (vinyl alcohol) complex imprinting

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• 作者：Jia-ming Liu^a ; ^{zzsyliujiaming@163.com} ; Li-ping Lin^a ; Xin-Xing Wang^a ; Wen-lian Cai^a ; Li-Hong Zhang^b ; Shao-qin Lin^a ; ^b
• 关键词：Quercetin ; Aluminum ; Poly (vinyl alcohol)&ndash ; [Al quercetin]3+complex ; Solid substrate room temperature phosphorimetry-complex imprinting coupling technique
• 刊名：Analytica Chimica Acta
• 出版年：2012
• 期刊代码：2_00032670
• 类别：ch
• 出版时间：20 April, 2012
• 卷：723
• 期：Complete
• 页码：76-82
• 文件大小：663 K

摘要

Al³⁺ could react with quercetin (Q) to form [AlQ]³⁺ complex which could be used as a template for the preparation of poly (vinyl alcohol)-[AlQ]³⁺ complex imprinting (PVA-C-I). The [AlQ]³⁺ not only had good matching ability and selectivity with the cavity of PVA-C-I, but also could react with the fluorescein isothiocyanate anion (FITC^{鈭?/sup>) on the outside of cavity by electrostatic interaction to form ion-association complex [AlQ]3+路[(FITC)鈭?/sup>]₃. The ion-association complex could emit strong and stable room temperature phosphorescence (RTP) on polyamide membrane (PAM) and the 螖I_p of the system had linear relationship with the content of Q, showing the highly selective identification of PVA-C-I to Q. Thus, a new coupling technique for the determination of trace Q based on solid substrate room temperature phosphorimetry and poly (vinyl alcohol) complex imprinting (PVA-C-I-SSRTP) was established. The linear range and limit of detection (LOD) of this method were 0.010-2.0 (脳10鈭?2 g mL鈭?) and 2.0 脳 10鈭?4 g mL鈭?, respectively, showing wide linear range and high sensitivity of PVA-C-I-SSRTP. This method was used to determine the content of Q in waste water, and the results are consistent with those by spectrofluorimetry. Meanwhile, the mechanism for the determination of Q using PVA-C-I-SSRTP was also discussed.}