Molecularly imprinted solid-phase extraction coupled to liquid chromatography for determination of Sudan dyes in preserved beancurds

► New imprinted microspheres (MIM) were synthesized by aqueous suspension polymerisation. ► MIM used as SPE sorbent for extraction of four Sudan dyes in preserved beancurd. ► Mimic template technology overcome the drawbacks of template leakage in quantitative analysis. ► Comparing with alumina and C18-based extraction, the selectivity and repeatability of MISPE were improved. ► The recoveries of Sudan dyes were ranged in 90.2-104.5% with RSD of less than 6.8%.