Detection method for esterifying power of distillers yeast

Abstract

The invention discloses a detection method for an esterifying power of distillers yeast. The detection method comprises sample pretreatment, titration and calculation. According to the invention, a mixed acid of caproic acid, acetic acid and lactic acid is used as an esterifying substrate to detect the esterifying power, and the caproic acid, acetic acid and lactic acid are directly prepared in absolute ethanol to prepare a caproic acid-acetic acid-lactic acid ethanol solution of which the concentration is 5%, so that acids which are insoluble in water are fully dissolved, detection results of the method are good in reproducibility and experimental data of the method are reliable, and the detection results can more truly reflect the esterifying and aroma producing abilities of a starter; according to the method, saponification is directly performed on an esterifying liquid to avoid loss of produced ester matters and make the detection results more accurate, and further save energy and lower consumption, simplify detection procedures and improve work efficiency; the method disclosed by the invention shortens the detection time, and is more conducive to rapid detection principles and suitable for industrialized large-scale detection.

Description

technical field [0001] The invention belongs to the technical field of brewing, and in particular relates to a method for detecting the esterification power of distiller's yeast. Background technique [0002] Liquor is a precious heritage left over from the five thousand years of Chinese civilization and an important component of Chinese traditional culture. Daqu is the driving force of brewing fermentation, and it is a composite carrier rich in bacteria, enzymes and substances needed for brewing. Daqu is used as a saccharification starter and flavoring agent in liquor brewing. Therefore, the quality of Daqu has a great influence on the yield and quality of liquor. [0003] With the advancement of science and technology and the development of the commodity economy, the advantages of regional resources and technological advantages of China's famous liquor have become increasingly prominent, and the phenomenon of exporting and commercializing and industrializing large-scale ...

AI Technical Summary

Problems solved by technology

And the mensuration of traditional esterification power is to carry out esterification power detection with single hexanoic acid as esterification substrate, be to adopt mass percent concentration to be 1% hexanoic acid and 20% ethanol solution when preparing hexanoic acid solution, but 1 % hexanoic acid cannot be completely dissolved in 20% ethanol solution, and the parallel sample and test results will cause great deviation when performing esterification test; and the traditional method is to distill the esterification liquid first and then take the distillation The liquid is saponified, and the esters will be lost during the distillation process. Therefore, the traditional method has the disadvantages of low accuracy of detection results, cumbersome determination procedures, and high energy consumption.

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