Method for non-destructively detecting glue-injected aquatic product

A non-destructive testing and aquatic product technology, which is applied in the direction of analysis using nuclear magnetic resonance, etc., can solve the problems of lack of diversity of detection technology and a large number of laboratory foundations, unsuitable for rapid detection of glue-filled products, and lack of professional technology. Application and promotion of value, strengthening monitoring of aquatic product quality, and low-cost effects

Inactive Publication Date: 2017-06-23
SHANGHAI OCEAN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0007] First of all, except for the hyperspectral detection method, most of the detection is based on the physical characteristics of the glue-injected prawns, which is unconvincing without professional technical support;
[0008] Secondly, these methods will damage the sample and require complex pre-treatment of the sample, which is not suitable for the rapid detection of glue-injected products by the testing department;
[0009] Finally, detection techniques lack diversity and a large laboratory base to support

Method used

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  • Method for non-destructively detecting glue-injected aquatic product
  • Method for non-destructively detecting glue-injected aquatic product
  • Method for non-destructively detecting glue-injected aquatic product

Examples

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Embodiment 1

[0055] Chinese prawns with a fresh weight of 15g are wrapped with polyethylene film after injection of gelatin, put them into a 60mm coil, adjust the position, and then optimize 1 The parameters of H NMR specifically include SW=100kHz, P1=18.00μs, P2=35.00μs, TD=299980, PRG=1, TW=2500.00ms, TE=0.500ms, NS=4, NECH=6000. Will 1 In the H NMR software, the CPMG sequence is used to collect the signals of Chinese prawns injected with gelatin, and the CPMG echo peak point data can be obtained by inverting the collected signals, and the gelatin-injected shrimp can be identified by the echo peak point data. Then, the CPMG echo peak point data is further processed by the peak value processing software to obtain T 2 value and its inversion peak area size, through the PCA data processing of these two types of data, it is possible to simply identify the type and concentration of glue-injected shrimp and inject glue-injected shrimp separately. Then optimize 1 H MRI parameters, specifical...

Embodiment 2

[0057] Chinese prawns with a fresh body weight of 30g were wrapped with polyethylene film after being injected with carrageenan, put them into a 60mm coil, adjusted the position, and then optimized 1 The parameters of H NMR specifically include SW=100kHz, P1=18.00μs, P2=35.00μs, TD=299980, PRG=1, TW=2500.00ms, TE=0.500ms, NS=4, NECH=6000. Will 1 In the HNMR software, the CPMG sequence is used to collect the signals of Chinese prawns injected with gelatin, and the CPMG echo peak point data can be obtained by inverting the collected signals, and the gelatin-injected shrimp can be identified through the echo peak point data. Then, the CPMG echo peak point data is further processed by the peak value processing software to obtain T 2 value and its inversion peak area size, through the PCA data processing of these two types of data, it is possible to simply identify the type and concentration of glue-injected shrimp and inject glue-injected shrimp separately. Then optimize 1 The ...

Embodiment 3

[0059] Chinese prawns with a fresh body weight of 100g were wrapped with polyethylene film after being injected with konjac glue, put them into a 70mm coil, adjusted the position, and then optimized 1 The parameters of H NMR specifically include SW=100kHz, P1=18.00μs, P2=35.00μs, TD=299980, PRG=1, TW=2500.00ms, TE=0.500ms, NS=4, NECH=6000. Will 1 In the HNMR software, the CPMG sequence is used to collect the signals of Chinese prawns injected with gelatin, and the CPMG echo peak point data can be obtained by inverting the collected signals, and the gelatin-injected shrimp can be identified through the echo peak point data. Then, the CPMG echo peak point data is further processed by the peak value processing software to obtain T 2 value and its inversion peak area size, through the PCA data processing of these two types of data, it is possible to simply identify the type and concentration of glue-injected shrimp and inject glue-injected shrimp separately. Then optimize 1 The...

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Abstract

The invention relates to a method for non-destructively detecting a glue-injected aquatic product. The method comprises the steps of performing CPMG sequence signal acquisition and analysis on a tested aquatic product by adopting an <1>H NMR device, conducting a blank test and optimizing test parameters in the analysis of <1>H NMR; processing obtained CPMG sequence maps, processing CPMG sequence echo peak point data, comparing the glue-injected aquatic product with a blank test aquatic product, and identifying normal and abnormal aquatic products. PCA processing is performed on CPMG sequence data; inversion software is used for performing inversion on the CPMG sequence maps to obtain a T2 value required in the test and an inversion peak area of each signal peak, which are combined with a PCA method to be analyzed and processed, and the glue-injected aquatic product and gelatinoid categories are identified. <1>H MRI imaging is performed on the glue-injected aquatic product; <1>H MRI is used for performing blank processing and optimizing the test parameters; an <1>H MRI imaging result is processed; and the glue-injected aquatic product is intuitively identified through distinct color contrast.

Description

technical field [0001] The invention belongs to the technical field of food safety, in particular to a method for non-destructive testing of glue-injected products. Background technique [0002] Chinese prawn (Penaeuschinensis) is also known as Oriental prawn, and its local name is prawn. Chinese prawns are the most widely distributed prawns in my country, belonging to the phylum Arthropoda, the class Crustacea, the order Decapod, the family Penaeidae, and the genus Penaeus. The carapace of prawns is smooth and transparent and very thin. The body length of shrimp is 13-24 cm, and the body length of female body is generally longer than that of male body, which is generally 12-15 cm. The male body is brownish-yellow, and the female body is blue-blue. The weight of shrimp is usually between 20-40 grams. [0003] Shrimp is one of the most important aquatic products in my country, and it occupies an important part in the aquatic economy. my country's Yellow Sea and Bohai Sea ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N24/08
CPCG01N24/08
Inventor 李敏唐毓祎杜玉梅周洋洋陈莹莹张炜佳
Owner SHANGHAI OCEAN UNIV
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