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化学学报
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化学学报 ›› 2010, Vol. 68 ›› Issue (04): 334-338. 上一篇    下一篇

研究论文

钯(II)-柠檬黄-离子液体三元络合体系的共振瑞利散射光谱及其分析应用研究

陈智栋1,2，肖莹1,2，曾延波1，李蕾*,1,2，路齐英1,2，王伟娟1,2   

  1. (1嘉兴学院生物与化学工程学院 嘉兴 314001)
    (2江苏工业学院化学化工学院 常州 213016)
  • 投稿日期:2009-05-30 修回日期:2009-09-18 发布日期:2010-02-28
  • 通讯作者: 李蕾 E-mail:lileichem@yahoo.com.cn
  • 基金资助:

    浙江省科技计划重点项目（No.2007C23071）；浙江省自然科学基金（No.Y4080252）资助项目

Resonance Rayleigh Scattering of Palladium(II)-tartrazine-ionic Liquid System and Its Analytical Application

Chen Zhidong1,2 Xiao Ying1,2 Zeng Yanbo1 Li Lei*,1,2 Lu Qiying1,2 Wang Weijuan1,2   

  1. (1 College of Biology and Chemical Engineering, Jiaxing University, Jiaxing 314001)
    (2 College of Chemistry and Chemical Engineering, Jiangsu Polytechnic University, Changzhou 213016)
  • Received:2009-05-30 Revised:2009-09-18 Published:2010-02-28
  • Contact: LI Lei E-mail:lileichem@yahoo.com.cn

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在pH 2.0～6.0的BR缓冲溶液中, Pd(II)与柠檬黄(TTZ)形成的络离子与溴化1-十六烷基-3-甲基咪唑([C16mim]Br)离子液体发生作用形成离子缔合物, 引起溶液共振瑞利散射(RRS)显著增强, 并产生新的RRS光谱, 其最大RRS峰位于458 nm. 在0.043～0.860 μg/mL范围内散射强度(ΔI)与柠檬黄的浓度成正比. 该方法简单灵敏, 对柠檬黄的检出限(3σ/K)为5.5 ng/mL (n＝11). 建立了一种简便、快速测定柠檬黄的新方法, 并成功用于饮料样中柠檬黄含量的测定.

关键词: 柠檬黄, 共振瑞利散射, 钯(II), 离子液体, 饮料

In pH 2.0～6.0 Britton-Robinson solution, palladium(II) was reacted with tartrazine to form a complex anion, which was further reacted with ionic liquid to form an anion-association complex, resulting in the change of the resonance Rayleigh scattering (RRS), and its maximum RRS peak was located at 458 nm. The RRS intensity is proportional to the concentration of tartrazine in the range of 0.043～0.860 μg/mL. The method shows high sensitivity and good selectivity, with the detection limit for tartrazine being 5.5 ng/mL (n＝11). The method can be applied to the determination of tartrazine in beverage.

Key words: tartrazine, resonance Rayleigh scattering, palladium(II), ionic liquid, beverage