离子液体自分散液-液微萃取测定食品中的柠檬黄与亮蓝  

Determination of Tartrazine and Brilliant Blue FCF Using Ionic Liquid Independent Disperse Liquid-Liquid Microextraction

作　　者：郭京波[1,2] 吴昊[1] 王婕燕[1] 杜黎明[1] 付云龙[1] 

机构地区：[1]山西师范大学分析测试中心,山西临汾041004 [2]山西师范大学工程学院,山西临汾041004

出　　处：《分析测试学报》2012年第12期1499-1504,共6页Journal of Instrumental Analysis

基　　金：国家自然科学基金项目(21171110);教育部高等学校博士学科点专项科研基金项目(20091404110001)

摘　　要：采用离子液体分散液液微萃取法研究了几种离子液体对软饮料、硬糖、果冻3种食品中柠檬黄与亮蓝的萃取作用,发现离子液体[C8MIM][BF4]能高选择性地富集这两种色素,且两者的一阶导数光谱互不干扰。在最佳条件下,柠檬黄和亮蓝的线性范围分别为20～1 000μg·L-1和3～150μg·L-1,检出限分别为6.60μg·L-1和0.84μg·L-1。该方法已成功用于食品中柠檬黄与亮蓝含量的测定且不受食品中杂质的干扰。A novel method using ionic liquid independent disperse liquid-liquid microextraction（IL-IDLLME） coupled with first derivative spectra was developed and applied in the determination of tartrazine（E102） and brilliant blue FCF（E133） in soft drink,candy and jelly samples.1.Octyl-3-methylimidazolium tetrafluoroborate （[C8MIM][BF4]） showed a high preconcentration for the two food dyes,and their first-derivative spectra will not interfere with each other.Under the optimal conditions,the calibration curves were linear in the ranges of 20-1 000 μg · L-1 for E102 and 3-150 μg · L-1 for E103.The detection limits based on three times the standard deviation of the blank（3Sb） were 6.60 μg·L-1for E102 and 0.84 μg·L-1for E103.The proposed method was applied successfully in the determination of two food dyes in food samples without any interference.

关 键 词：柠檬黄 亮蓝 食品 离子液体 分散液液微萃取 

分 类 号：O658.2[理学—分析化学] R364.23[理学—化学]