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Detection method of irradiated dried seafood

A detection method and dry product technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of protein destruction, odor, decolorization, etc., and achieve the effect of strong separation ability, wide application range and low detection limit

Active Publication Date: 2017-04-19
舟山出入境检验检疫局综合技术服务中心
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Problems solved by technology

[0003] The potential safety of irradiated food has always been controversial. Improper irradiation will have some side effects on the color, taste, and nutrition of food, such as decolorization, odor, and destruction of nutrients such as protein and fat.
[0019] At present, there is no QTRAP-UPLC-MS / MS technology in China to determine tyrosine, phenylalanine and 2-hydroxyphenylalanine by separating various isomers of tyrosine and phenylalanine A method for the identification and quantitative detection of irradiated aquatic products by the content of acid and 3-hydroxyphenylalanine

Method used

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  • Detection method of irradiated dried seafood
  • Detection method of irradiated dried seafood
  • Detection method of irradiated dried seafood

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Experimental program
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Embodiment

[0064] A detection method for irradiated aquatic product dry products, the steps are as follows:

[0065] 1. Sample pretreatment

[0066] (1) Sample processing: crush the sample to be tested and put it into a container, seal it and refrigerate it for later use;

[0067] (2) Acid hydrolysis: Weigh 0.2 g of the sample and put it into a 20 mL acid hydrolysis glass tube, add 10 mL of 6moL / L hydrochloric acid, fill it with nitrogen, cover it tightly with a screw cap, and acid hydrolyze overnight at 110°C to obtain an acid hydrolysis solution;

[0068] (3) Purification: take the acid solution and filter it with filter paper, put it in a glass centrifuge tube, centrifuge at 12000r / min at 4°C for 10min, take 5mL of the supernatant, blow dry it with nitrogen at 35°C, and then lyophilize it. Dissolve the lyophilized product in 1mL of 0.1% formic acid aqueous solution, filter with a 0.22μm aqueous nylon filter membrane, and use the filtrate as a sample solution for the detection of 2-hy...

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Abstract

The invention discloses a detection method of irradiated dried seafood, comprising a sample pretreatment step, a QTRAP-UPLC-MS / MS detection analysis step, and an irradiation dose quantitative detection step. A variety of amino acids and isomers thereof can be separated at the same time, and a qualitative analysis, a quantitative analysis, and a secondary qualitative analysis can be made. The method can be used to judge whether dried seafood is irradiated or not and determine the irradiation dose. The result is reliable. The limit of detection is low. The method is suitable for rapid detection of irradiated dried seafood.

Description

technical field [0001] The invention relates to the technical field of aquatic product detection, in particular to a detection method for irradiated dried aquatic products. Background technique [0002] Food irradiation is the use of ionizing radiation ( 60 Co or 137 The rays produced by Cs radioactive sources, electron beams below 10 MeV or X-rays produced by electron accelerators) are used to process food, and the radiation chemistry and radiation biology benefits produced by ionizing radiation in food are used to control foodborne pathogens. The purpose of reducing microbial load and pest infestation, inhibiting physiological processes and extending shelf life. Because of its characteristics of cold processing, no secondary pollution and chemical residues, and low energy consumption, it has been widely used in food packaging materials, grain, fruit and other fields of insecticide and sterilization. According to other studies, irradiation technology also has a certain i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02
CPCG01N30/02
Inventor 邵宏宏周秀锦相兴伟张静傅谧妮
Owner 舟山出入境检验检疫局综合技术服务中心
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