Ethyl carbamate (EC) is a Group 2A carcinogen naturally found in fermented foods and alcoholic beverages; cyanide is not only a toxic and harmful substance in distilled liquors, but also an important precursor of EC. This study applied lab-scale pot still second distillation technology to the pilot scale production of distillery, and studied its effects on cyanide, EC, total acid, total ester, trace components and sensory quality. The results showed that the distillation efficiency of pilot scale pot still second distillation reached 99.32%; the absolute removal rate (R1) and relative removal rate (R2) of cyanide was 96.10% and 78.43%, respectively; the absolute removal rate (R'1) and relative removal rate of EC (R'2) was 97.10% and 98.47%, respectively; the concentrations of cyanide and EC in the heart of liquor decreased to 23.75 μg/L and 8.08 μg/L, respectively. After second distillation, the concentrations of total acid and total ester decreased by 93.90% and 19.87%, respectively. Most volatile fatty acids decreased significantly, and the content of ethyl lactate decreased by 71.05%, while the content of ethyl caproate, ethyl butyrate and ethyl acetate increased by 15.69%, 7.14% and 9.40%, respectively. In terms of sensory quality, its aroma and liquor mellowness after pot still second distillation were slightly worse than that of the raw liquor, but its taste was more pure and reduced the off-flavor of the raw liquor to a certain extent.
WANG Jinmeng
,
FAN Wenlai
,
XU Yan
,
YANG Jinyu
,
XIE Guopai
,
SUN Lulu
,
XUE Xijia
. Influence of pilot scale pot still second distillation on ethyl carbamate and cyanide in Baijiu and the quality of raw liquor[J]. Food and Fermentation Industries, 2022
, 48(5)
: 53
-57
.
DOI: 10.13995/j.cnki.11-1802/ts.030800
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