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Rapid determination method for content of total sugar in dry red wine

A technology for dry red wine and total sugar content. It is applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions. It can solve the difficult judgment of the end point, long time consumption, and difficult operation. problems, to achieve the effect of eliminating the influence of human factors, simple steps, and accurate measurement

Inactive Publication Date: 2016-09-21
INSPECTION & QUARANTINE COMPREHENSIVE TECH CENT JIANGXI ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most wines have color, even darker color, especially when the sample is hydrolyzed and neutralized, the color will be darker, and it is difficult to judge the end point of the direct iodometric method, and there are many factors that affect the repeatability of the method. Skilled inspectors will inevitably have large errors
In addition, the operation of this method involves titration while heating. During the operation, the experimenter must not only endure the baking of a high-temperature electric furnace, but also pay attention to the color change of the titration end point at all times. The operation is difficult and time-consuming, and the accuracy and repeatability are affected. Human factors have a greater influence

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A kind of rapid determination method of total sugar content in dry red wine, comprises the following steps:

[0013] 1) Sample preparation: Take 20mL of Qingquan Chateau dry red wine (liquid temperature 20°C) into a volumetric flask with a capacity of 25mL, add 5mL of HCl, put it in a water bath at a temperature of 67-69°C for acid hydrolysis for 15 minutes, take it out and cool it to room temperature , make up to volume with pure water, shake well and set aside;

[0014] 2) Instrument calibration: choose the automatic reducing sugar analyzer based on the Fehling titration reaction principle. After the automatic reducing sugar analyzer is started, it will automatically complete three blank tests, that is, the calibration T1. Mark T2, manually drop 0.5 mL of 1% glucose standard solution for verification;

[0015] 3) Sample measurement: Add the dry red wine of Qingquan Chateau after the post-acid hydrolysis treatment in step 1) dropwise into the reaction pool of the auto...

Embodiment 2

[0021] A kind of rapid determination method of total sugar content in dry red wine, comprises the following steps:

[0022] 1) Sample preparation: Take 20mL of Juluzhuang dry red wine (liquid temperature 20°C) into a volumetric flask with a capacity of 25mL, add 5mL of HCl, put it in a water bath at a temperature of 67-69°C for acid hydrolysis for 15 minutes, take it out and cool it to room temperature , make up to volume with pure water, shake well and set aside;

[0023] 2) Instrument calibration: choose the automatic reducing sugar analyzer based on the Fehling titration reaction principle. After the automatic reducing sugar analyzer is started, it will automatically complete three blank tests, that is, the calibration T1. Mark T2, manually drop 0.5 mL of 1% glucose standard solution for verification;

[0024] 3) Sample measurement: Add the Qingquan Chateau dry red wine that has been treated in step 1) into the reaction pool of the automatic reducing sugar tester, press th...

Embodiment 3

[0030] A kind of rapid determination method of total sugar content in dry red wine, comprises the following steps:

[0031] 1) Sample preparation: Take 20mL of dry red wine (liquid temperature 20°C) from Demisto’s private collection and put it in a volumetric flask with a capacity of 25mL, add 5mL of HCl, and place it in a water bath at a temperature of 67-69°C for acid hydrolysis for 15 minutes , take out and cool to room temperature, dilute to volume with pure water, shake well and set aside;

[0032] 2) Instrument calibration: choose the automatic reducing sugar analyzer based on the Fehling titration reaction principle. After the automatic reducing sugar analyzer is started, it will automatically complete three blank tests, that is, the calibration T1. Mark T2, manually drop 0.5 mL of 1% glucose standard solution for verification;

[0033] 3) Sample measurement: Add the Qingquan Chateau dry red wine that has been treated in step 1) into the reaction pool of the automatic ...

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Abstract

The invention relates to a rapid determination method for the total sugar content in dry red wine, comprising the following steps: 1) sample preparation; 2) instrument calibration: selecting an automatic reducing sugar measuring instrument based on the Fehling titration reaction principle, and automatically measuring reducing sugar After the instrument is started, it automatically completes three blank tests, that is, calibration T1. After the titration time of the three times of automatic memory tends to be stable, perform calibration T2, and manually add 0.5 mL of a glucose standard solution with a mass fraction of 1% for verification; 3) the sample Measurement: Add the dry red wine after acid hydrolysis treatment in step 1) dropwise into the reaction pool of the automatic reducing sugar tester, press the test button, automatically enter the measurement program, and automatically print after the measurement is completed. The rapid determination method of the total sugar content in dry red wine of the present invention has simple steps, and the automatic reducing sugar measuring instrument based on the Fehling titration reaction principle can stabilize various conditions affecting biochemical reactions, and can simply, quickly and accurately determine the total sugar in wine content.

Description

technical field [0001] The invention relates to a rapid determination method for the total sugar content in dry red wine. Background technique [0002] The total sugar content in wine is one of the important indicators to evaluate the quality of wine and the type of wine, and the sweetness of wine mainly comes from the sugar in wine. At present, the domestic and foreign methods for determining the total sugar content in wine include: high performance liquid chromatography, colorimetric method of quinone, colorimetric method of 3,5-dinitrosalicylic acid, direct titration method and indirect iodometric method. Direct titration is widely used because of its simplicity, rapidity, stable reagents, and less equipment required. However, most wines have color, even darker color, especially when the sample is hydrolyzed and neutralized, the color will be darker, and it is difficult to judge the end point of the direct iodometric method, and there are many factors that affect the rep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
CPCG01N21/78
Inventor 江龙发白凌云周小芬耿响邵小宇占春瑞祝建新
Owner INSPECTION & QUARANTINE COMPREHENSIVE TECH CENT JIANGXI ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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