The detection of illegal addition dyes in grain products with graphitized carbon black filled polyamide composite membrane

Abstract

Abstract Herein, graphitized carbon black (GCB) filled polyamide (PA) composite (PA@GCB) membrane extraction combined with ultra-performance liquid chromatography-tandem four-stage mass spectrometry (UPLC–MS/MS) was used for rapid detection of 12 illegal addition dyes in grain products. GCB was used as an adsorbent in the composite membrane. When samples were pretreated by the PA@GCB composite membrane, the illegal addition dyes were absorbed by GCB into the surface and pore of the composite membrane, while most other ingredients were passed through the composite membrane. Then, the illegal addition dyes were eluted from the membrane by different solvents to be analyzed by UPLC–MS/MS. The recovery of the dyes was ranged from 71–124%, and the precision was between 3 and 14. The results showed that the PA@GCB composite membrane would be used as a new pretreatment method for detecting multicomponent illegal addition dyes in grain products, which was rapid, simple, reliable accurate and safety.