Determination of acrylamide in brewed coffee by dispersive liquid-liquid microextraction (DLLME) and ultra-performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS).

This work has proposed the application of optimized dispersive liquid-liquid microextraction (DLLME) in order to extract acrylamide from brewed coffee samples for its subsequent determination by ultra-performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS). DLLME achieved superior results employing 300 μL of brewed coffee, 100 μL of dichloromethane, 400 μL of acetonitrile and without sodium chloride addition. Quantitative analyses were carried out by the standard addition method, and the limits of detection and quantification were 0.9 and 3.0 μg L-1, respectively. Recoveries ranged from 97 to 106%, and the intra- and inter-assay precisions ranged from 6 to 9%. The proposed analytical method was applied to seventeen brewed coffee samples prepared in a filter coffee maker, and acrylamide amounts varied from 10.5 to 28.5 μg L-1. Therefore, the suggested DLLME-UPLC-MS/MS method is promising for routine analysis in order to guarantee the quality control of acrylamide in brewed coffee.