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  

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

作　　者：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] 

机构地区：[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

出　　处：《化学学报》2010年第4期334-338,共5页Acta Chimica Sinica

基　　金：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

摘　　要：在pH2.0～6.0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458nm.在0.043～0.860μg/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5.5ng/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.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.

关 键 词：柠檬黄 共振瑞利散射 钯(II) 离子液体 饮料 

分 类 号：TS207.3[轻工技术与工程—食品科学]