Determination of formaldehyde in beverages using microwave-assisted derivatization and ionic liquid-based dispersive liquid-liquid microextraction followed by high-performance liquid chromatography

► We present a new, rapid and sensitive method for formaldehyde determination. ► Derivatization, extraction and preconcentration of formaldehyde in one step. ► Microwave-assisted derivatization and IL-based DLLME was first applied. ► Trace formaldehyde in complex beverages sample.