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Method for testing milk protein stability

A milk protein and inspection method technology, which is applied in the field of milk protein stability inspection, can solve problems such as the inability to determine the quality of raw milk, and achieve reliable detection results, low cost, and simple methods

Inactive Publication Date: 2006-08-02
INNER MONGOLIA YILI INDUSTRIAL GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no test method used to test the thermal stability of milk protein, so the existing test methods cannot better and comprehensively determine the quality of raw milk

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: the method for checking milk protein stability, comprises the following steps:

[0019] (1) Sample preparation: Take quantitative milk as a test sample, and place the test samples in two test tubes of a clean stainless steel test tube set; quantitative milk accounts for at least 1 / 2 of the test tube volume, and the two test tubes The amount of milk test sample, the error is not more than 3ml.

[0020] (2) Preheating the sample: heating the medium in the heating container, the medium is oil with a flash point at least higher than 300°C. The viscosity of the oil is less than 100m 2 / s, and tasteless after heating, such as smokeless silicone oil. When the temperature of the oil in the heating container rises steadily to 65°C, put the set of test tubes into the heating container for preheating, and when the temperature of the sample in the test tube rises to 60°C, tighten the sealing caps of the two test tubes respectively;

[0021] (3) High temperature tre...

Embodiment 2

[0025] Embodiment 2: the method for checking milk protein stability, comprises the following steps:

[0026] (1) Prepare the test samples: take the quantitative milk in the milk tank as the test sample, and place the test samples in ten test tubes of the clean stainless steel test tube group; Information is connected and formed into a group. The ten test tubes are arranged in a radial pattern, and the quantitative milk accounts for at least 4 / 5 of the test tube volume, and the amount of milk test samples in the ten test tubes shall have an error of no more than 3ml.

[0027] (2) Preheating the sample: heating the medium in the heating container, wherein the heating medium in the heating container is oil with a flash point at least higher than 300°C. Oil is a viscosity less than 100m 2 / s, odorless oil after heating, such as smokeless salad oil. When the temperature of the oil in the heating container rises steadily to 95°C, put the set of test tubes into the heating contain...

Embodiment 3

[0031] Embodiment 3: the method for checking milk protein stability, comprises the following steps:

[0032] (1) Prepare the test samples: take the quantitative milk in the milk tank as the test sample, put the test samples into sixteen test tubes of the clean stainless steel test tube group respectively; Good information connects and forms a group. Sixteen test tubes are arranged in a radial pattern, the quantitative milk accounts for at least 2 / 3 of the test tube volume, and the amount of milk test samples in ten test tubes, the error is not more than 3ml.

[0033] (2) Preheating the sample: heating the medium in the heating container, wherein the heating medium in the heating container is oil with a flash point at least higher than 300°C. Oil is a viscosity less than 100m 2 / s, odorless oil after heating, such as smokeless salad oil. When the temperature of the oil in the heating container rises steadily to 80°C, put the set of test tubes into the heating container for p...

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Abstract

The present invention discloses an inspection method of milk protein stability. Said method includes the following steps: preparing sample to be inspected, preheating sample, high-temperature treatment, constant temperature treatment, cooling treatment, making detection and analysis and judging result. Said method can be used for controlling raw material milk quality for processing milk product.

Description

Technical field: [0001] The invention relates to a method for testing the stability of milk protein, in particular to a method for testing the stability of milk protein by using a thermal stability method. Background technique: [0002] The current national standard "Purchasing Standards for Raw Milk" stipulates the inspection items and inspection methods of raw milk, but the inspection items and methods do not include the inspection of the thermal stability of raw milk protein. In production practice, according to the "Fresh Milk Purchasing Standards", milk that passes the inspection will often coagulate or agglomerate due to protein denaturation during the process of processing UHT milk or within the specified shelf life. Up to now, there is no test method used to test the thermal stability of milk protein, so the existing test methods cannot better and comprehensively determine the quality of raw milk. The invention fills up the blank of testing the stability of milk pro...

Claims

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Application Information

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IPC IPC(8): G01N33/483G01N33/04
Inventor 李永利李印所赵利锋武建义
Owner INNER MONGOLIA YILI INDUSTRIAL GROUP CO LTD
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