Method for distinguishing milk doped with ewe's milk by near infrared spectrum

A technology of near-infrared spectroscopy and discrimination method, which is applied in the field of discrimination of goat milk mixed with milk, can solve the problems of inaccuracy, waste, and damage to sample milk, and achieve broad development prospects and accurate and reliable detection

Inactive Publication Date: 2010-12-29
NORTHWEST A & F UNIV
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Problems solved by technology

Although these physical and chemical detection methods are simple, they are not accurate enough to meet the actual needs. Most importantly, they will destroy the sample milk and cause unnecessary waste.
[0003] Near-infrared spectroscopy is a fast, non-destructive, pol

Method used

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  • Method for distinguishing milk doped with ewe's milk by near infrared spectrum
  • Method for distinguishing milk doped with ewe's milk by near infrared spectrum
  • Method for distinguishing milk doped with ewe's milk by near infrared spectrum

Examples

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Embodiment Construction

[0041] A near-infrared spectrum discrimination method for milk mixed with goat's milk, the method comprising the following steps:

[0042] 1) Select a milk sample

[0043] The preparation of adulterated milk containing goat's milk with different weight concentration gradients is prepared according to the concentration of goat's milk with a gradient of 5%, 10%, 20%, 35%, 50%, 75%, and 100% by weight, respectively, to obtain Experimental samples with different concentrations of goat milk; 8 kinds of experimental samples were combined with fresh milk, 10 samples for each gradient, a total of 80 samples for use.

[0044] 2) Near-infrared spectrum collection

[0045] Using a Fourier transform near-infrared spectrometer combined with a solid optical fiber probe with a diameter of 2mm to collect the diffuse reflectance spectrum of milk; the detection wavenumber range is 4000-12000cm -1 , interval 8cm -1 , each scan was averaged 64 times, and the absorbance value log1 / R was recorde...

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Abstract

The invention discloses a method for distinguishing milk doped with ewe's milk by a near infrared spectrum, and the method comprises the following steps: 1) selecting a milk sample; 2) collecting the near infrared spectrum; and 3) carrying out cluster analysis and establishing a qualitative distinguishing model, thus carrying out the cluster analysis on raw milk and adulteration milk and realizing qualitative judgment. By using the method, the milk doped with ewe's milk can be detected rapidly qualitatively and quantitatively; and when the weight percentage of the ewe's milk in the adulteration milk is greater than or equal to 5 percent, the accuracy of detection can reach 100 percent, and the detection time of a single sample is within 1 minute.

Description

technical field [0001] The invention relates to a method for discriminating goat milk mixed with milk, in particular to a near-infrared spectrum discrimination method for goat milk mixed with milk. Background technique [0002] With the continuous improvement of people's living standards, the consumption of dairy products increases rapidly, especially the development of high-nutrition cow dairy products is even more rapid. Raw milk is the basic raw material for the production of milk products, and its quality control is a crucial link in production management. In actual production and processing, in order to reduce costs and seek higher commercial interests, some milk suppliers sell milk mixed with goat milk as fresh milk, which damages the interests of consumers and the interests of milk product manufacturers. , and reduces the quality of milk products, causing great harm. At present, the main methods for identifying goat milk mixed with milk are: one method is to use the...

Claims

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Application Information

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IPC IPC(8): G01N21/31
Inventor 丁武罗军李亮王晨
Owner NORTHWEST A & F UNIV
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