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Water migration detection method in cooling process after killing of pig

A detection method and cooling process technology, applied in the direction of material analysis through resonance, measuring devices, and analysis materials, etc., can solve the problems of small meat samples, large sample damage, and affecting the accuracy and representativeness of measurement results, and meet the requirements of The need for the determination of large samples and the effect of accurate sample information

Active Publication Date: 2017-06-13
NANJING AGRICULTURAL UNIVERSITY
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Problems solved by technology

However, the application of traditional low-field NMR technology in meat moisture detection has certain defects, mainly in the fact that the meat sample is too small (2×1×1cm), and the degree of damage to the sample is relatively large during the sample preparation process, which may cause Affect the accuracy and representativeness of the assay results

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  • Water migration detection method in cooling process after killing of pig
  • Water migration detection method in cooling process after killing of pig
  • Water migration detection method in cooling process after killing of pig

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Embodiment 1

[0026] (1) Raw material selection: select the whole longissimus dorsi (tong ridge) within 2 hours after slaughter, take meat pieces with a size of 14×10×6 cm along the direction perpendicular to the muscle, and divide them into 2 groups (one group removes pigs The fascia tissue on the surface of the skin and pork is used as the red strip group; one group retains the fascia tissue on the surface of the pig skin and pork, and the fascia tissue with a dense structure and a certain thickness is simulated as a fat layer, which is used as the white strip group). Blowing cooling and atomizing spray cooling were carried out in the cold storage environment, and the meat samples were subjected to low-field nuclear magnetic resonance transverse relaxation time at 6:30, 8:00, 9:30, 11:00, 13:30 and 15:00, respectively. (T2) and low-field MRI measurements.

[0027] (2) Low-field nuclear magnetic imaging: The SE imaging sequence test was used to change the proton density and the influence o...

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Abstract

The invention discloses a water migration detection method in a cooling process after the killing of a pig. The method comprises the following steps: (1) preparing a sample; (2) carrying out low-field nuclear magnetic imaging analysis: putting a meat sample into a sample tube, carrying out imaging analysis by a low-field nuclear magnetic resonance spectrometer so as to obtain the image of the sample, and judging a water distribution situation according to colors in the image; (3) analyzing low-field nuclear magnetic relaxation time T2: putting the meat sample in the sample tube, measuring the low-field nuclear magnetic relaxation time T2 by the low-field nuclear magnetic resonance spectrometer, and detecting the water distribution in the meat. The method has the key that the water migration detection method in the cooling process of the meat is characterized in that the water migration detection method combines low-field nuclear magnetic imaging with a T2 relaxation method, and a standard method is provided for researching a loss mechanism in the cooling process of meat and researching and developing the control technology of cooling loss.

Description

technical field [0001] The invention relates to the technical field of meat food processing and production, and relates to a method for detecting moisture migration in the post-mortem cooling process of pork, in particular to a method for detecting moisture distribution in the post-mortem cooling process of pork based on large-aperture low-field nuclear magnetic imaging and T2 relaxation technology method. Background technique [0002] Pre-cooling is an important part of cooling pork processing, and the water loss of pig carcass in the cooling process is 1.85% to 3.5%, which has caused serious economic losses to the enterprise. Therefore, meat companies try various techniques to reduce carcass cooling loss. Atomized spraying technology is a technology that can not only accelerate the cooling rate of carcass, but also reduce the loss of water in the cooling process, and can effectively reduce the economic loss caused by cooling dry consumption. [0003] At present, most dom...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N24/08
CPCG01N24/08G01N24/082
Inventor 李春保周光宏庄昕波黄子信徐幸莲
Owner NANJING AGRICULTURAL UNIVERSITY
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