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Method for measuring alcohol degree of rice wine simply and rapidly

A technology for rapid determination of alcohol content, applied in the direction of testing food, testing beverages, material inspection products, etc., can solve the problems of poor anti-interference, long time, complicated operation, etc., and achieve the effect of strong anti-interference ability and low cost

Active Publication Date: 2015-01-07
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a simple and fast method for measuring the alcohol content of rice wine in order to overcome the shortcomings of the alcohol meter method, which are time-consuming, cumbersome to operate, and poor in anti-interference.

Method used

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  • Method for measuring alcohol degree of rice wine simply and rapidly
  • Method for measuring alcohol degree of rice wine simply and rapidly
  • Method for measuring alcohol degree of rice wine simply and rapidly

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Preparation of Standard Curve for Determination of Alcohol

[0032] In this embodiment, methanol is selected as an added substance, and the standard curve for alcohol determination is firstly prepared, and then the alcohol content of three commercially available yellow rice wines is determined using this alcohol determination standard curve, and compared with the measurement results of the alcohol meter method, In this way, the accuracy of the method of the present invention is evaluated. details as follows:

[0033] Five groups of ethanol-water systems were prepared, and the standard curve for alcohol determination was obtained by exploring the relationship between the volume change of the ethanol-water system caused by the unit mass of methanol and the volume percentage of ethanol in the system;

[0034] (1) Take a dry 100 mL empty volumetric flask and measure its true volume V and mass M;

[0035] (2) Add 5.0mL of absolute ethanol to the volumetric flask, then dist...

Embodiment 2

[0048] Determination of Alcohol Content of Three Kinds of Yellow Rice Wine Samples

[0049] Select three commercially available yellow rice wines, Minjiang Old Wine, Qinghong Minpai Yellow Wine, and Fangxiang Qinghong, and measure the volume changes of these three wine samples caused by methanol per unit mass according to the method described, and substitute them into the alcohol determination standard curve equation to calculate the alcohol content. The results are detailed in Table 3. The deviations of the two measurement results of the alcoholic strength of the three alcohols are all within 5%, which is valid data.

[0050] Table 3 The alcohol content results of three kinds of commercially available yellow rice wine measured by the method of the present invention

[0051]

[0052] Note: 1 and 2 represent two groups of parallel, y 平均 for y 1 and y 2 Arithmetic mean; Deviation refers to the percentage of the absolute difference between the two groups of parallel meas...

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Abstract

The invention particularly relates to a method for measuring the alcohol degree of rice wine simply and rapidly, and aims to overcome defects that a common alcohol degree meter method generally adopted by current rice wine alcohol degree detection requires distillation, consumes long time and is tedious to operate and poor in anti-interference. On the basis of the physico-chemical property of an ethanol water system and a solid matter system in rice wine, the method for measuring the alcohol degree of rice wine simply and rapidly is provided and comprises steps as follows: methanol is added into a to-be-measured rice wine sample, the volume variable quantity of the wine sample due to adding of the methanol is measured and then substituted into a standard alcohol degree measuring curve to calculate the alcohol degree of the wine sample, and the standard alcohol degree measuring curve is that y is equal to the sum of 1.308 and a product obtained by multiplying minus 0.017 by k; parallel determination is performed for twice, the arithmetic mean value of two measured values plus or minus a standard deviation is taken as a final alcohol measuring result; and the absolute difference value of the two-time measured values cannot exceed 5% of the arithmetic mean value. The measuring method is simple, convenient, rapid, high in anti-interference capacity and lower in cost, the accuracy meets the national standard requirement, and the method is applicable to real-time rapid measurement of the alcohol degree of the product in the current production process of the rice wine process.

Description

technical field [0001] The invention specifically relates to a simple and rapid method for measuring the alcohol content of yellow rice wine. Background technique [0002] Yellow rice wine is one of the three major ancient wines in the world and is a national specialty of our country. It is made from grains and brewed with koji. Because of its rich nutrition, low alcohol content and unique flavor, taste and efficacy, it is very popular among the people. Studies have shown that rice wine is rich in active components, which have physiological effects such as anti-oxidation, anti-aging, lowering blood pressure, lowering cholesterol, participating in body metabolism and immune regulation. With the continuous enhancement of people's health awareness, rice wine with nutrition, health and health care characteristics has been loved by more and more consumers, which provides a good opportunity for the development of rice wine. [0003] The development of rice wine is inseparable ...

Claims

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Application Information

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IPC IPC(8): G01N33/14
Inventor 倪莉黄志清冯江朵
Owner FUZHOU UNIV
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