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  • Crown ether microfunctionalized carbon nanotubes for dispersive micro-solid-phase extraction of sudan dyes and their metabolites.

Crown ether microfunctionalized carbon nanotubes for dispersive micro-solid-phase extraction of sudan dyes and their metabolites.

Food chemistry (2018-05-13)
Li-Jing Du, Yu-Han Hu, Qiu-Yan Wang, Qi-Dong Zhang, Yu-Bo Chen, Li-Qing Peng, Shu-Lei Pan, Qin Li, Jun Cao
ABSTRACT

In this study, dispersive micro solid phase extraction (DMSPE) combined with ultrahigh-performance liquid chromatography coupled with quadrupole time-of-flight tandem mass spectrometry method was established to extract and determine sudan dyes and their metabolites in real samples. The crown ether microfunctionalized multi-walled carbon nanotubes (MWCNTs) was applied as the sorbent in DMSPE procedure. Several experimental parameters that can effect the extraction performance of the DMSPE method were investigated separately by a univariate method. The validation data showed that the limits of detection were in the range of 0.084-13.13 μg/kg, the mean recoveries were ranged from 80.15 to 103.58% for six samples. Compared with other published methods, the proposed method was more effective, more time-saving and more eco-friendly. Finally, the developed method was successfully applied to enrich and detect sudan dyes and their metabolites in real samples.

MATERIALS
Product Number
Brand
Product Description

Supelco
o-Aminoazotoluene, analytical standard
Sigma-Aldrich
Benzo-15-crown-5, 98%