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首页> 外文期刊>Journal of chromatography, A: Including electrophoresis and other separation methods >Molecularly imprinted matrix solid-phase dispersion combined with dispersive liquid-liquid microextraction for the determination of four Sudan dyes in egg yolk
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Molecularly imprinted matrix solid-phase dispersion combined with dispersive liquid-liquid microextraction for the determination of four Sudan dyes in egg yolk

机译：分子印迹基质固相分散体与分散液液微萃取相结合用于蛋黄中四种苏丹红的测定

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摘要

A new kind of aniline-naphthol molecularly imprinted microsphere (MIM) synthesized by aqueous suspension polymerization was applied as a selective sorbent of miniaturized matrix solid-phase dispersion combining with dispersive liquid-liquid microextraction (MSPD-DLLME) for the simultaneous determination of four Sudans in egg yolk samples. The solid sample was directly blended with MIM in MSPD procedure and the eluent of MSPD was used as the dispersive solvent of the followed DLLME for further purification and enrichment of the analytes before HPLC analysis. Good linearity for all the Sudan dyes was ranged from 0.02μgg~(-1) to 2.0μgg~(-1) (r2≥0.9990) and their recoveries at three spiked levels were ranged from 87.2% to 103.5% with RSD less than 6.1% (n=3). The presented MIM-MSPD-DLLME method combined the advantages of MIM, MSPD and DLLME, and could be applied for the determination of Sudans in complicated food samples.
机译：采用水悬浮聚合法合成的新型苯胺-萘酚分子印迹微球（MIM）作为微型基质固相分散体与分散液-液微萃取（MSPD-DLLME）的选择性吸附剂，用于同时测定四个苏丹在蛋黄样品中。将固体样品与MIM直接按MSPD步骤混合，并将MSPD的洗脱液用作后续DLLME的分散溶剂，以在HPLC分析之前进一步纯化和富集分析物。所有苏丹染料的线性均好，介于0.02μgg〜（-1）至2.0μgg〜（-1）（r2≥0.9990），三个加标水平的回收率介于87.2％至103.5％，RSD小于6.1。 ％（n = 3）。提出的MIM-MSPD-DLLME方法结合了MIM，MSPD和DLLME的优点，可用于复杂食品中苏丹红的测定。

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