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A method to predict the shelf life of uht milk

A technology of shelf life and equation, applied in the field of predicting the shelf life of UHT milk, can solve problems such as storage for 2 weeks or even less time, and achieve the effect of simple and easy calculation method, fast detection speed, and reduced investment.

Active Publication Date: 2011-12-28
INNER MONGOLIA MENGNIU DAIRY IND (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as far as the current situation is concerned, fat floating phenomenon is very common in UHT milk. Some UHT milk will appear after 3 months of storage, and some will appear within 2 weeks or even less after storage.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: Predicting the shelf life of UHT milk

[0023] Set the shelf life reference value of the fat content in the upper layer of UHT milk at room temperature (T2=25°C) to 6.54%-6.78%. Under this shelf life reference value, the storage time and storage temperature satisfy the following equation:

[0024] Logt=A / T+M

[0025] Among them, t is the storage time, T is the storage temperature, A is the characteristic coefficient, and M is the correlation coefficient.

[0026] The correlation coefficient under this reference value is M=0.039.

[0027] From the date of production, a batch of UHT milk samples were taken and stored at 45°C, and the fat content of the upper layer of UHT milk stored at the actual storage temperature (T1=45°C) was measured every five days.

[0028] The detection steps of upper layer fat are as follows:

[0029] 1. Carefully cut open the package, and carefully draw 50mL of the upper milk sample with a pipette.

[0030] 2. Put the absorbed upp...

Embodiment 2

[0034] Example 2: Predicting the shelf life of UHT milk

[0035] Set the shelf life reference value of the fat content in the upper layer of UHT milk at room temperature (T2=25°C) to 6.54%-6.78%. Under this shelf life reference value, the storage time and storage temperature satisfy the following equation:

[0036] Logt=A / T+M

[0037] Among them, t is the storage time, T is the storage temperature, A is the characteristic coefficient, and M is the correlation coefficient.

[0038] The correlation coefficient under this reference value is M=0.040.

[0039] From the date of production, a batch of UHT milk samples were taken and stored at 45°C, and the fat content of the upper layer of UHT milk stored at the actual storage temperature (T1=45°C) was measured every three days.

[0040] The detection steps of the upper layer fat are the same as those in Example 1.

[0041] When the fat content in the upper layer of UHT milk stored at T1=45°C reaches 6.54%, it falls within the ran...

Embodiment 3

[0044] Example 3 predicts the shelf life of UHT milk

[0045] Set the shelf life reference value of the fat content in the upper layer of UHT milk at room temperature (T2=25°C) to 6.54%-6.78%. Under this shelf life reference value, the storage time and storage temperature satisfy the following equation:

[0046] Logt=A / T+M

[0047] Among them, t is the storage time, T is the storage temperature, A is the characteristic coefficient, and M is the correlation coefficient.

[0048] The correlation coefficient under this reference value is M=0.035.

[0049] From the date of production, a batch of UHT milk samples were taken and stored at 45°C, and the fat content of the upper layer of UHT milk stored at the actual storage temperature (T1=45°C) was measured every five days.

[0050] The detection steps of the upper layer fat are the same as those in Example 1.

[0051] When the fat content in the upper layer of UHT milk stored at T1=45°C reaches 6.57%, it falls within the range of ...

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Abstract

The invention relates to a method for predicting the shelf life of UHT milk, comprising the following steps: setting a fat content value in the upper layer of UHT milk at normal temperature T2 as a reference value for shelf life, and the storage time and storage temperature satisfy the equation : Logt=A / T+M, wherein, t is the storage time, T is the storage temperature, A is the characteristic coefficient, and M is the correlation coefficient; detect the fat content of the upper layer in the UHT milk stored under the actual storage temperature T1, when the actual storage When it is detected at time t1 that the fat content of the upper layer reaches the reference value of shelf life, substituting T1 and t1 into the equation to obtain A; substituting M, A and T2 into the equation to obtain the shelf life t2 of UHT milk at room temperature. The present invention establishes a method for predicting the shelf life of UHT milk by using the fat content of the upper layer. When developing a new UHT milk product, this method can be used to determine its shelf life in a short period of time, so that the research and development results can be converted into economic benefits as soon as possible.

Description

technical field [0001] The invention relates to a method for predicting the shelf life of UHT milk, in particular to a method for predicting the shelf life of UHT milk by detecting the fat content in the upper layer of UHT milk. Background technique [0002] UHT (Ultra High Temperature) milk is a product that appeared in the 1960s. It refers to cow milk products processed by ultra-high temperature sterilization and aseptic filling processes. [0003] Compared with pasteurized milk, UHT milk solves the problems of liquid milk transportation, storage and preservation, and effectively maintains protein, calcium and other nutrients. Its characteristics are: the product can achieve commercial sterility, only need to be stored at room temperature, no cold chain is required for distribution, long shelf life (generally can be stored for 1 to 6 months), and the nutritional ingredients in milk (except for some water-soluble vitamins) ) is basically the same as pasteurized milk. Comp...

Claims

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Application Information

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IPC IPC(8): G01N33/04
Inventor 郭奇慧白雪胡新宇刘卫星
Owner INNER MONGOLIA MENGNIU DAIRY IND (GRP) CO LTD
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