Solid-phase microextraction for the analysis of some alcohols and esters in beer: Comparison with static headspace method

摘要

Headspace solid-phase microextraction (SPME) has been used for the determination of 12 alcohols and esters in beer. SPME analysis parameters using polyacrylate fiber have been defined and compared with the static headspace (SHS) method used as a reference. Limits of detection, linearity, and repeatability of both methods have been determined using standard solutions. Limits of detection of SPME were generally lower than of the SHS method, and addition of salt enhanced SPME adsorption. Both methods were characterized by high repeatability and good linearity. Results of beer analyses obtained by using these two methods were highly correlated, which indicates the possibility of SPME application as an inexpensive alternative to automated SHS in the analysis of higher alcohols and esters in beer. [References: 18]