3D hierarchical magnetic hollow sphere-like CuFe2O4 combined with HPLC for the simultaneous determination of Sudan I-IV dyes in preserved bean curd
3D hierarchical magnetic hollow sphere-like CuFe2O4 combined with HPLC for the simultaneous determination of Sudan I-IV dyes in preserved bean curd
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DOI：
10.1016/j.foodchem.2017.08.113
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发表时间：
2018-02-15
期刊：
影响因子：
8.8
通讯作者：
Zhang, Lei
中科院分区：
文献类型：
--
作者：
Liu, Xueyan;Qi, Xinyu;Zhang, Lei
设计了三维（3D）分级磁性空心球状CuFe 2 O 4（3D HMHS-CuFe 2 O 4），结合HPLC-DAD对四种苏丹染料进行灵敏检测。对3D HMHSCuFe_2O_4的形成机理进行了讨论。与颗粒状CuFe 2 O 4（PL-CuFe 2 O 4）相比，所获得的3D HMHSCuFe 2 O 4对四种苏丹染料（I，II，III和IV）提供了更高的萃取效率，这是由于其具有适当互连的孔的分层中空结构，其中目标可以容易地扩散到反应位点。建立了磁性固相萃取-高效液相色谱法同时测定4种苏丹红染料的方法。在优化条件下，线性范围为5-4000 ng g（-1），相关系数r（2）>= 0.9991，检出限为0.56-0.60 ng g（-1），回收率为91.1%~ 99.3%，精密度为99.3%。
Three-dimensional (3D) hierarchical magnetic hollow sphere-like CuFe2O4 (3D HMHS-CuFe2O4) were designed to sensitively detect four Sudan dyes combined with HPLC-DAD. The formation mechanism of 3D HMHSCuFe2O4 is also discussed. Compared to the particle-like CuFe2O4 (PL-CuFe2O4), the as-obtained 3D HMHSCuFe2O4 provided a higher extraction efficiency for the four Sudan dyes (I, II, III and IV) due to its hierarchical hollow structure with properly interconnected pores where the targets can easily diffuse into the reaction sites. Thus, a magnetic solid-phase extraction (MSPE)-HPLC method was established for the simultaneous measurement of the four Sudan dyes. Under optimized conditions, good linearity (5-4000 ng g(-1), r(2) >= 0.9991), limits of detection (LODs, 0.56-0.60 ng g(-1)), recoveries (91.1%-99.3%) and precision (RSDs