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Method for determining content of methylmercury in fish oil

A methylmercury and fish oil technology, applied in measurement devices, preparation of test samples, instruments, etc., can solve problems such as the inability to quickly and accurately measure fish oil, and achieve a short analysis period, high accuracy, and low reagent consumption. Effect

Inactive Publication Date: 2012-06-20
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

However, this invention cannot quickly and accurately measure the content of methylmercury in fish oil to determine whether it can be eaten directly without directly causing damage to the human nerve center, so this invention still needs to be further improved

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  • Method for determining content of methylmercury in fish oil
  • Method for determining content of methylmercury in fish oil
  • Method for determining content of methylmercury in fish oil

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Embodiment Construction

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0018] Such as Figure 1 to Figure 3 Shown, the method for measuring methylmercury content in fish oil of the present embodiment comprises the following steps (following percentages are all percentages and are mass percentages):

[0019] 1. Sample extraction: Weigh 0.5mL fish oil sample, put it into a container, add 3mm concentration of 10% KOH + 1% thiourea into the container, stir for 20 minutes, then put the stirred solution into a centrifuge Centrifuge, then add 1mm concentration of 20% HCl solution for neutralization, stir for 20 minutes, put the neutralized solution in a centrifuge and centrifuge, take the supernatant, and then pass the supernatant through a filter hole of 0.45 Filter with a micron filter membrane, and dilute to 10ml with deionized water to prepare the test solution for later use;

[0020] 2. Chromatographic analysis: ...

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Abstract

The invention discloses a method for determining a content of methylmercury in fish oil, which comprises extracting a sample, performing chromatographic analysis, performing atomic fluorescence analysis, performing data acquisition on intensities of fluorescence emitted from mercury atoms by data processing software, and listing the collected data to conveniently and accurately detect the content of methylmercury in the fish oil. The invention has advantages that it simultaneously employs the chromatographic analysis and atomic fluorescence analysis, and carries out selection of a mobile phase, and control of the concentration and flow rate of the mobile phase in the chromatographic analysis, and selection of a reductant and an oxidant and control of the lamp current and carrier gas in the atomic fluorescence analysis, thus the content of methylmercury in the fish oil is determined rapidly and conveniently. In addition, the method has low reagent consumption, short analysis period, good stability and high accuracy, and is very practical.

Description

technical field [0001] The invention relates to a method for measuring methylmercury content in fish oil. Background technique [0002] Fish oil has an irreplaceable role in the prevention of human diseases and human health care. Its main component, EPA, has the effect of dredging and cleaning the heart and blood vessels. DHA is an indispensable substance for the formation and development of brain cells. Therefore, fish oil has become a popular Popular health products. However, due to the increasingly serious marine pollution, some marine fish contain a large amount of methylmercury, and methylmercury is highly fat-soluble and easily exists in the extracted fish oil. Methylmercury can pass through the brain-blood barrier of the human body and directly damage the human nerve center. Therefore, it is necessary to detect methylmercury in fish oil to ensure the safety of fish oil health care products. [0003] In the prior art, there is a Chinese invention patent with the appl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06G01N21/64G01N1/28
Inventor 徐君辉周向阳沈飚
Owner 舟山出入境检验检疫局综合技术服务中心
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