Analysis of Para Red and Sudan Dyes in Egg Yolk by UPLC-MS-MS

摘要

Matrix solid-phase dispersion (MSPD) with alumina N as adsorbent has been used for extraction of para red, Sudan 1, Sudan 2, Sudan 3, and Sudan 4 dyes from egg yolk. The extracts were analyzed by ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS-MS). Mean recovery for the five dyes ranged from 63.2 to 98.6%, with CV 0.55-10.00%. One sample was confirmed to contain 0.3 mg kg(-1) Sudan 4.