Development and validation of a matrix solid-phase dispersion method to determine acrylamide in coffee and coffee substitutes

J Food Sci. 2010 Apr;75(3):T57-63. doi: 10.1111/j.1750-3841.2010.01545.x.

Abstract

The present study describes the development and validation of a new method based on a matrix solid-phase dispersion (MSPD) sample preparation procedure followed by GC-MS for determination of acrylamide levels in coffee (ground coffee and brewed coffee) and coffee substitute samples. Samples were dispersed in C(18) sorbent and the mixture was further packed into a preconditioned custom-made ISOLUTE bilayered SPE column (C(18)/Multimode; 1 g + 1 g). Acrylamide was subsequently eluted with water, and then derivatized with bromine and quantified by GC-MS in SIM mode. The MSPD/GC-MS method presented a LOD of 5 microg/kg and a LOQ of 10 microg/kg. Intra and interday precisions ranged from 2% to 4% and 4% to 10%, respectively. To evaluate the performance of the method, 11 samples of ground and brewed coffee and coffee substitutes were simultaneously analyzed by the developed method and also by a previously validated method based in a liquid-extraction (LE) procedure, and the results were compared showing a high correlation between them.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't
  • Validation Study

MeSH terms

  • Acrylamide / analysis*
  • Acrylamide / chemistry
  • Analytic Sample Preparation Methods*
  • Beverages / analysis*
  • Coffea / chemistry
  • Coffee / chemistry*
  • Gas Chromatography-Mass Spectrometry
  • Limit of Detection
  • Reproducibility of Results
  • Seeds / chemistry
  • Solid Phase Extraction

Substances

  • Coffee
  • Acrylamide