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.
Keywords: SPME; static headspace; beer alcohols; esters
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