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Method for rapidly evaluating usage amount of silica gel and PVPP (Crosslinked Polyethylene Pyrrolidone) by using charge titration technique

A usage-amount, silica gel technology is applied in the field of evaluating the stabilization aids in the beer filtration process, which can solve the problems of long test time, low accuracy, and inability to judge the usage amount of silica gel and PVPP in advance, so as to reduce production costs, Avoid overdosing

Active Publication Date: 2015-02-18
TSINGTAO BREWERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former is the method used in actual production. The disadvantage is that the test time is long, which takes 1 to 2 weeks, and there is a lag
The latter uses indirect indicators to evaluate, and the accuracy is not high
Both methods have hysteresis, and the usage of silica gel and PVPP cannot be judged in advance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0022] A method utilizing charge titration technique to quickly evaluate the amount of silica gel used, the steps of the method are as follows:

[0023] Step 1: Add 10ml of beer to be filtered into a charge analyzer to measure its streaming potential V; through the charge analyzer detection, its streaming potential is -100mv;

[0024] Step 2: Weigh 1g of silica gel for use;

[0025] Step 3: After the streaming potential V is stable, slowly add the silica gel weighed in step 2 to the beer to be filtered in a small amount and multiple times, the streaming potential of the beer to be filtered will gradually increase, and stop when the streaming potential V reaches 0 Add to;

[0026] Step 4: Record the weight Ws of the remaining silica gel at this time as 0.996g;

[0027] Step 5: Determine the optimum amount of silica gel used in the beer to be filtered D1=(1-Ws) / Lp=(1g-0.996g) / 10ml=400mg / l;

[0028] The dosage at this time is similar to the dosage recommended by the manufactur...

example 2

[0030] A method utilizing charge titration technology to quickly evaluate the amount of PPVP used, the steps of the method are as follows:

[0031] Step 1: Add 10ml of beer to be filtered into a charge analyzer to measure its streaming potential V; through the charge analyzer detection, its streaming potential is -100mv;

[0032] Step 2: Weigh 1g PPVP for use;

[0033] Step 3: After the streaming potential V is stable, slowly add the PPVP weighed in step 2 to the beer to be filtered in a small amount and multiple times, the streaming potential of the beer to be filtered will gradually increase, and stop when the streaming potential V reaches 0 Add to;

[0034] Step 4: Record the weight Ws of the remaining PVPP at this time as 0.998g;

[0035] Step 5: determine the optimum PVPP dosage of beer to be filtered D1=(1-Ws) / Lp=(1g-0.998g) / 10ml=200mg / l;

[0036] The dosage at this time is similar to the dosage recommended by the manufacturer.

experiment example

[0038] The colloid streaming potential V of beer, sensitive protein, sensitive polyphenol, silica gel solution and PVPP solution in the range of pH4.0 and pH4.4 was measured.

[0039]

[0040] It can be seen from the results that in the range of pH 4.0-4.4, the charge of the colloidal particles of beer is negative, which is caused by the negative charge of the colloidal particles of sensitive proteins, sensitive polyphenols and other substances contained therein. The colloidal particles of silica gel and PVPP are positively charged. Explain the interaction between silica gel and sensitive protein, PVPP and sensitive polyphenol. The larger the difference between the two, the stronger the adsorption.

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PUM

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Abstract

The invention relates to a method for evaluating the application of a stabilizing auxiliary in a beer filtration process, and in particular relates to a method for rapidly evaluating the usage amount of silica gel and PVPP (Crosslinked Polyethylene Pyrrolidone) by using a charge titration technique. Charges of colloidal particles of sensitive protein and sensitive polyphenol in beer are negative, the charges of silica gel and PVPP are positive, and along with the increase of the usage amount of the silica gel and the PVPP, the charges of the colloidal particles in the beer are gradually converted into positive charges from negative charges. The addition amount of the silica gel and the PVPP of which the number of the charges is approximate to 0 is taken as the optimal usage amount of the silica gel and the PVPP. According to the method, by evaluating the charge situation of the colloidal particles of the silica gel and the PVPP of the beer, the optimal action condition and optimal usage proportion of the beer stabilizing auxiliaries can be effectively determined. Therefore, the application of the stabilizing auxiliary can be rapidly optimized, and the purposes of stabilizing the quality of the beer and lowering the production cost are achieved.

Description

technical field [0001] The invention relates to a method for evaluating the use of stabilizing aids in the beer filtration process, and relates to a method for rapidly evaluating the amount of silica gel and PVPP used by using charge titration technology. Background technique [0002] Sensitive proteins and sensitive polyphenols are substances that affect the stability of beer colloids. Silica gel and PVPP are stability additives, silica gel is used to remove sensitive proteins in beer, and PVPP is used to remove sensitive polyphenols in beer. The amount of silica gel and PVPP used determines the effect of removing sensitive proteins and sensitive polyphenols. A small amount of addition will cause incomplete removal of sensitive proteins and sensitive polyphenols, which will affect the colloidal stability of beer and shorten the shelf life of beer; while a large amount of addition will cause excessive removal of proteins and polyphenols, affecting the foam of beer and anti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N31/16
Inventor 余俊红刘佳董建军尹花黄树丽黄淑霞胡淑敏陈璐杨梅
Owner TSINGTAO BREWERY
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