Kvasny Prum. 1995; 41(10): 302-307 | DOI: 10.18832/kp1995018

Comparison of extraction methods for volatile substances isolation from beer.Peer-reviewed article

P. DOSTÁLEK, P. KWACZEK, J. ŘEZÁČ, J. ČEPIČKA

Extraction methods used for volatile substances isolation from beer are described and compared. Extractions into N-pentan and dichlormethan mixture in ratio 2:1 with varying extraction time (eg. 24 hrs, 16 hrs, 8hrs and 2 hrs performed in a continual extraction apparatus) as well as distillate batch extraction into dichlormethan were verified. A 12% beer was used as a sample. The highest concentration of higher alcohols was measured during 24 hrs extraction time; the highest estere and fatty acids level was being found during 16 hrs extraction time. The ratio of higher alcohols and esters attained the highest level (3.02) during 24 hrs extraction, the lowest (2.38) then during 16 hrs extraction. Steam distillation followed by batch extraction into dichlormethan resulted in lower yields of volatile substances, however, seen from the viewpoint of time and extraction solvent saving, this method appears suitable for practice by its reproducible results.
(In Czech, English summary only)

Keywords: beer, volatile compounds, isolation, methods, comparation

Published: October 1, 1995