Poly(N-isopropylacrylamide-co-N,N′-methylene bisacrylamide) monolithic column embedded with γ-alumina nanoparticles microextraction coupled with high-performance liquid chromatography for the determination of synthetic food dyes in soft drink samples

► Poly(NIPAAm-co-MBAAm)-Al2O3 monolithic column was synthesized. ► Experimental conditions were optimized for microextraction of synthetic food dyes. ► PMME-HPLC was successfully used to determine synthetic food dyes in drink samples.