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A method for detecting the esterification power of highland barley Daqu

A detection method and technology of esterification force are applied in the field of esterification force detection of highland barley Daqu, which can solve the problems of inability to apply well and inaccurate esterification force detection of highland barley Daqu, etc. full response effect

Active Publication Date: 2022-01-28
青海互助天佑德青稞酒股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for the highland barley Daqu used in the brewing of highland barley wine, the general method is not suitable for the detection of the esterification power, and it is easy to cause problems such as inaccurate detection of the highland barley Daqu esterification power, which is not conducive to those skilled in the art based on the esterification capacity. To further stabilize and improve the quality of highland barley Daqu through the detection of chemical strength, causing adverse effects

Method used

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  • A method for detecting the esterification power of highland barley Daqu
  • A method for detecting the esterification power of highland barley Daqu
  • A method for detecting the esterification power of highland barley Daqu

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The detection method of the esterification power of highland barley Daqu comprises the following steps:

[0039] 1) Sample processing: pulverize the barley Daqu sample to be tested, and put the pulverized sample into a sample bag; the pulverized barley Daqu sample is screened through a 60-mesh sieve, and the pass rate is 100%, and the barley Daqu sample to be tested is obtained;

[0040] 2) Esterification sample preparation comprises the following steps:

[0041] 2.1) Use a pipette to draw 1.00mL of acetic acid into a 250mL Erlenmeyer flask with a stopper;

[0042] 2.2) Use a pipette to draw 15.00 mL of absolute ethanol into the corked Erlenmeyer flask in step 2.1);

[0043] 2.3) After slightly shaking the corked Erlenmeyer flask in step 2.2), use a pipette to draw 85.00 mL of distilled water (the amount is specifically the amount of absolute ethanol and reach 100 mL) and add it to the corked Erlenmeyer flask in step 2.2), fully Mix well to obtain a mixed solution;

...

Embodiment 2

[0083] Comparison test of acetic acid and hexanoic acid:

[0084] In this test, five parts of highland barley Daqu samples (samples of five different production batches) were used to carry out five groups of comparative tests simultaneously with acetic acid and hexanoic acid as substrates respectively. The test steps were basically the same as in Example 1, except that: In 2.1), use hexanoic acid or acetic acid, the addition amount is 1.5mL; in step 2.2), the addition amount of ethanol is 25.0mL; in step 2.3), the addition amount of distilled water is 75.00mL; in step 2.4), the addition amount of highland barley Daqu is 25.00g . See the table below for the results of the esterification test.

[0085]

[0086]

[0087] It can be clearly seen from the data that there is a significant difference between acetic acid and caproic acid in the esterification of highland barley Daqu and there is no rule to follow, and the use of caproic acid may detect negative values. It is no...

Embodiment 3

[0089] Comparison of crushing degree of highland barley Daqu:

[0090] In this experiment, five experiments were carried out, the highland barley and Daqu to be tested were crushed and passed through a 60-mesh sieve, the passing rate of the sieve was changed, and the test results of the esterification power were compared. Each test of this embodiment is carried out with reference to the steps of Example 1, the difference is only that the 60-mesh sieve passing rate of the highland barley Daqu sample to be tested in different test groups is different, specifically see the table below.

[0091]

[0092] Note: "Maximum precision" in the table refers to the maximum number of values ​​obtained by dividing the absolute difference of the measured results of any two parallel experiments by the arithmetic mean of the two parallel experiments in each parallel experiment. The meaning of the maximum precision involved in the following examples is the same.

[0093] It can be clearly se...

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Abstract

The invention provides a method for detecting the esterification power of highland barley Daqu, the detection method is more in line with the detection of the esterification power of highland barley Daqu, which is conducive to improving the accuracy of detection, thereby helping technicians to stabilize the esterification power of highland barley Daqu Or improve the quality of highland barley Daqu. The detection method comprises the following steps: 1) crushing the highland barley Daqu to be tested, and sieving; 2) the test group adds Mg of the highland barley Daqu to be tested obtained in step 1) into a mixture of acetic acid, ethanol and water for esterification; Distill the esterification liquid obtained by esterification and collect the distillate rich in ethyl acetate, and distill the distillate to volume to obtain the esterification sample of the test group; the blank group is prepared according to the esterification sample of the test group The steps are to prepare the esterified samples of the blank group, and the test sample of the highland barley Daqu is not added during the preparation process; 3) neutralization and saponification; 4) titration with sulfuric acid solution; 5) calculation of the esterification power of the highland barley Daqu to be tested.

Description

technical field [0001] The invention relates to the field of highland barley wine brewing, in particular to a method for detecting the esterification power of highland barley Daqu used for highland barley wine brewing. Background technique [0002] The production of esters and aromas is a very important part of solid-state liquor brewing, and most of this ability to produce esters and aromas comes from the esterification power of Daqu. Esterification ability refers to the ability of esterifying enzymes (collectively referred to as esterases and lipases) to catalyze the formation of esters from acids and alcohols. However, the esterification reaction is reversible, and the esterification enzyme can both produce ester and decompose ester under different conditions. The esterification ability of Daqu is an important index to evaluate the quality of Daqu. At present, the detection method of esterification ability is mainly based on the general analysis method of brewing Daqu. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N31/16G01N1/28
Inventor 梁鼎冯声宝喇录忠孙海浪刘有升唐东恒李玉英薛晓晴赵文娟张天俊
Owner 青海互助天佑德青稞酒股份有限公司
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