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Method for detecting heavy metal content of aquatic product

A detection method and technology for heavy metals, applied in measurement devices, material analysis by electromagnetic means, instruments, etc., can solve the problems of uneconomical environmental protection, complicated use of instruments, etc., achieve good enrichment effect, reduce detection costs, and accurate and reliable results Effect

Active Publication Date: 2018-07-24
MARINE FISHERIES RES INST OF ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The Chinese patent application number 201410105734.6 discloses a detection method for heavy metal content in aquatic products, which has the advantages of simple operation, short extraction time, high extraction purity, sensitive and accurate detection, etc., but this method needs to use a large amount of nitric acid and hydrochloric acid in a microwave digestion instrument Digestion in the medium, the use of complex instruments, need to use nitric acid and hydrochloric acid, not economical and environmentally friendly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh ferric iron tetroxide nano-magnetic powder, add it into pure water, disperse with the probe ultrasonic for 40 minutes for the first time, and obtain the dispersion liquid; then add TEOS and APTES with a volume ratio of 1:2 in turn, shake on a shaker at room temperature for 45 minutes, and then Ultrasonic treatment for 30 minutes, and separation under the condition of an external magnetic field, Fe can be prepared 3 o 4 @SiO 2 Nanoparticle dispersion; under ultrasonic condition in water bath, in Fe 3 o 4 @SiO 2 The aqueous solution of polyethylene glycol chitosan graft was added dropwise to the nanoparticle dispersion, Fe 3 o 4 @SiO 2 The mass ratio of nanoparticles to polyethylene glycol chitosan graft was 1:0.5, and the water bath was continued to be ultrasonicated for 5 minutes, washed alternately with absolute ethanol and deionized water, and vacuum-dried at 40°C to obtain a magnetic heavy metal adsorbent.

[0025] After the inedible internal organs, fis...

Embodiment 2

[0027] Weigh ferric iron tetroxide nano-magnetic powder, add it into pure water, disperse by ultrasonic probe for 20 minutes for the first time, and obtain dispersion liquid; then add TEOS and APTES with a volume ratio of 1:1 in turn, shake on a shaker at room temperature for 40 minutes, and then Ultrasonic treatment for 20 minutes, and separation under the condition of an external magnetic field, Fe can be prepared 3 o 4 @SiO 2 Nanoparticle dispersion; under ultrasonic condition in water bath, in Fe 3 o 4 @SiO 2 The aqueous solution of polyethylene glycol chitosan graft was added dropwise to the nanoparticle dispersion, Fe 3 o 4 @SiO 2 The mass ratio of nanoparticles to polyethylene glycol chitosan graft was 1:1, and the water bath was continued to be ultrasonicated for 10 minutes, washed alternately with absolute ethanol and deionized water, and vacuum-dried at 50°C to obtain a magnetic heavy metal adsorbent.

[0028] After the inedible internal organs, fish skin, fis...

Embodiment 3

[0030] Weigh iron ferric oxide nano-magnetic powder, add it into pure water, and disperse it with ultrasonic probe for 30 minutes for the first time to obtain a dispersion liquid; then add TEOS and APTES with a volume ratio of 1:1.5 in turn, shake on a shaking table at room temperature for 50 minutes, and then Ultrasonic treatment for 25 minutes, and separation under the condition of an external magnetic field, Fe can be prepared 3 o 4 @SiO 2 Nanoparticle dispersion; under ultrasonic condition in water bath, in Fe 3 o 4 @SiO 2 The aqueous solution of polyethylene glycol chitosan graft was added dropwise to the nanoparticle dispersion, Fe 3 o 4 @SiO 2The mass ratio of nanoparticles to polyethylene glycol chitosan graft was 1:0.8, and the water-bath ultrasonic was continued for 7 minutes, washed alternately with anhydrous ethanol and deionized water, and vacuum-dried at 45°C to obtain a magnetic heavy metal adsorbent.

[0031] After the inedible internal organs, fish skin...

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Abstract

The invention relates to the field of aquatic product detection, and discloses a method for detecting the heavy metal content of an aquatic product. The method comprises the following steps: 1), pretreating: removing inedible inner organs, fish skin, fish scales, fish bones and other hard tissues of the aquatic product, then crushing remaining tissues into minced meat, adding an aqueous Triton X-100 solution and a magnetic heavy metal adsorbent, mixing and stirring; 2), performing heavy metal extraction; 3), calibrating a standard curve; 4), performing heavy metal content detection. By the heavy metal detection method, strong acid and a microwave digestion instrument are not required to be used for digestion, operation is simple, safety and environment friendliness are achieved, the effectof enriching heavy metals in the aquatic product is good, the magnetic heavy metal adsorbent can be reused, remaining impurities of the aquatic product have no influence on a detection sample duringthe detection, and a detection result is accurate, so that the heavy metal detection method is a very accurate, efficient and environment-friendly detection method and has a practical significance inimproving the food safety.

Description

technical field [0001] The invention relates to the field of aquatic product detection, in particular to a method for detecting heavy metal content in aquatic products. Background technique [0002] In recent years, due to the increasingly serious environmental pollution and bioaccumulation, the heavy metal content in aquatic products is getting higher and higher. In order to ensure people's health and life safety, it is necessary to measure the heavy metal content in aquatic products to ensure that aquatic products quality. There are many methods commonly used for the determination of heavy metal content in aquatic products, such as flame atomic absorption, inductively coupled plasma mass spectrometry, atomic fluorescence spectrometry, etc. [0003] The Chinese patent application number 201410105734.6 discloses a detection method for heavy metal content in aquatic products, which has the advantages of simple operation, short extraction time, high extraction purity, sensiti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/62
CPCG01N27/62
Inventor 梅光明孟春英顾捷黄丽英
Owner MARINE FISHERIES RES INST OF ZHEJIANG
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