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Method for detecting stability of dairy product

A dairy product and stability technology, applied in the field of dairy product quality inspection, can solve the problems of low accuracy and precision, narrow application range, long test time, etc., achieve wide detection range, simple detection method, and improve accuracy Effect

Pending Publication Date: 2021-12-07
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

[0005] The technical problem to be solved by the present invention is to overcome the defects of low accuracy and precision, poor repeatability, long test time and narrow application range of the detection method in the prior art for dairy products with high viscosity, and to provide a fast and accurate , high precision, good repeatability, wide detection range of dairy product stability detection method

Method used

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  • Method for detecting stability of dairy product
  • Method for detecting stability of dairy product
  • Method for detecting stability of dairy product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Embodiment 1 low viscosity sample

[0054] The present embodiment provides a method for detecting the stability of dairy products, comprising the steps of:

[0055] (1) Take commercially available milk as the dairy product to be tested, adopt a viscometer and use a ULA rotor to measure the viscosity of the milk, repeat the measurement three times, and get the average value. The viscosity of the commercially available milk is 1.89cp.

[0056] (2) Take 2.0g of milk that is uniformly mixed and without bubbles, load it into a 2mm PC sample tube, use a LUMiSizer X65 stability analyzer, set the rotation speed at 3000rpm, scan time interval at 15s, total scan times at 150 times, and test temperature at Optical analysis was carried out at 25°C with a light intensity factor of 1.0. The measurement was repeated three times for each sample, and the instability index of the product was read separately to calculate the repeatability, accuracy and precision. The results are shown in ...

Embodiment 2

[0057] Embodiment 2 low viscosity sample

[0058] The present embodiment provides a method for detecting the stability of dairy products, comprising the steps of:

[0059] (1) Take the same batch of milk in Example 1 as the dairy product to be tested.

[0060] (2) Take 2.0g of milk that is uniformly mixed and without bubbles, load it into a 2mm PC sample tube, use a LUMiSizerX65 stability analyzer, set the rotation speed at 3500rpm, scan time interval at 15s, total scan times at 150 times, and test temperature at 25 ℃, the light intensity factor is 1.0, and the test is carried out. Each sample is repeatedly measured three times, and the instability index of the product is read respectively, and the repeatability, accuracy and precision are calculated. The results are shown in Table 1.

Embodiment 3

[0061] Embodiment 3 low viscosity sample

[0062] The present embodiment provides a method for detecting the stability of dairy products, comprising the steps of:

[0063] (1) Take the same batch of milk in Example 1 as the dairy product to be tested.

[0064] (2) Take 2.0 g of milk that is uniformly mixed and free of bubbles, load it into a 2 mm PC sample tube, use a LUMiSizerX65 stability analyzer, set the rotation speed at 4000 rpm, scan time interval at 15 s, total scan times at 150 times, and test temperature at 25 ℃, the light intensity factor is 1.0, and the measurement is repeated three times for each sample. The instability index of the product is read respectively, and the repeatability, accuracy and precision are calculated. The results are shown in Table 1.

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Abstract

The invention belongs to the technical field of quality detection of dairy products, and particularly provides a method for detecting the stability of dairy products, which comprises the following steps: (1) determining the viscosity eta of a dairy product to be detected; (2) a step of a pretreatment; (3) a step of determining the instability index. The method for testing the stability of the dairy product, provided by the invention, is high in accuracy, high in precision and good in repeatability, and the detection method is simple, rapid, wide in detection range and suitable for determining the dairy product of which the viscosity range is lower than 15000 cp.

Description

technical field [0001] The invention belongs to the technical field of quality detection of dairy products, and in particular relates to a method for detecting the stability of dairy products. Background technique [0002] Dairy products refer to various dairy products that use cow's milk or goat's milk and their processed products as the main raw material, add or not add appropriate amount of vitamins, minerals and other auxiliary materials, and use the conditions required by laws, regulations and standards. Food, also called dairy products. Because dairy products contain a certain amount of protein and fat, thickeners or colloids are sometimes added. After the product is sterilized by high temperature, there may be problems such as water separation, precipitation, fat floating and flocculation during the shelf life of 6-12 months. Stability issues. Therefore, it is of great significance to establish a stability detection method for dairy products to investigate the quali...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/59G01N11/14
CPCG01N21/59G01N11/14
Inventor 季慧苹李艳如李洪亮牛世祯孙丽生杨畅
Owner INNER MONGOLIA MENGNIU DAIRY IND (GRP) CO LTD