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Method for detecting content of heavy metals in aquatic product

A detection method and technology for heavy metals, which are applied in the preparation of test samples, fluorescence/phosphorescence, material excitation analysis, etc., can solve the problems of low extraction efficiency of metal elements, hidden dangers in the use of aquatic products, low detection accuracy, etc. Simple, short extraction time and high extraction purity

Inactive Publication Date: 2014-06-25
SUZHOU YANGCHENGHU MODERN AGRI INDPARK SPECIAL AQUACULTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current detection methods in our country have problems such as low extraction efficiency of metal elements, small amount of extraction and low detection accuracy, which lead to major hidden dangers in the safety of aquatic products.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Extraction of heavy metals: Accurately weigh 1.0000g of aquatic product meat and place it in a microwave digestion tank, add 20mL of a mixture of nitric acid and hydrochloric acid with a volume ratio of 10:1 (the concentration of nitric acid is 1.5 mol / L, the concentration of hydrochloric acid concentration is 1.0 mol / L), the digestion tank is sealed and placed in a microwave digestion apparatus for microwave digestion. The microwave digestion process is: within 3 to 4 minutes, the microwave digestion apparatus is raised from room temperature to 100 ℃, after the pressure reaches 0.9-1.0MPa, continue to heat up to 170°C within 2-3 minutes, and keep warm for digestion for 30 minutes; Transfer the digestion solution to a 25.0mL volumetric flask to obtain a heavy metal-containing aquatic product solution; make a reagent blank solution at the same time;

[0017] (2) Prepare heavy metal standard solution: Use a pipette to pipette 0.05mL 1000mg / L standard solution of lead,...

Embodiment 2

[0020] (1) Extraction of heavy metals: Accurately weigh 1.0000g of aquatic product meat and place it in a microwave digestion tank, add 25mL of a mixture of nitric acid and hydrochloric acid with a volume ratio of 10:1 (the concentration of nitric acid is 1.5 mol / L, the concentration of hydrochloric acid concentration is 1.0 mol / L), the digestion tank is sealed and placed in a microwave digestion apparatus for microwave digestion. The microwave digestion process is: within 3 to 4 minutes, the microwave digestion apparatus is raised from room temperature to 100 ℃, after the pressure reaches 0.9-1.0MPa, within 2-3 minutes, continue to heat up to 180 ℃, keep warm for 20 minutes for digestion reaction; Transfer the digestion solution to a 25.0mL volumetric flask to obtain a heavy metal-containing aquatic product solution; make a reagent blank solution at the same time;

[0021] (2) Prepare heavy metal standard solution: Use a pipette to pipette 0.05mL 1000mg / L standard solution of...

Embodiment 3

[0024] (1) Extraction of heavy metals: Accurately weigh 1.0000g of aquatic product meat and place it in a microwave digestion tank, add 30mL of a mixture of nitric acid and hydrochloric acid with a volume ratio of 10:1 (the concentration of nitric acid is 1.5 mol / L, the concentration of hydrochloric acid concentration is 1.0 mol / L), the digestion tank is sealed and placed in a microwave digestion apparatus for microwave digestion. The microwave digestion process is: within 3 to 4 minutes, the microwave digestion apparatus is raised from room temperature to 100 ℃, after the pressure reaches 0.9-1.0MPa, within 2-3 minutes, continue to heat up to 180 ℃, keep warm for 20 minutes for digestion reaction; Transfer the digestion solution to a 25.0mL volumetric flask to obtain a heavy metal-containing aquatic product solution; make a reagent blank solution at the same time;

[0025] (2) Prepare heavy metal standard solution: Use a pipette to pipette 0.0075mL 1000mg / L standard solution ...

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Abstract

The invention discloses a method for detecting the content of heavy metals in an aquatic product. The heavy metals comprise lead, chromium, cadmium, copper and silver. The detection method comprises the following steps of (1) extracting the heavy metals; (2) preparing a heavy metal standard solution; and (3) detecting the content of the heavy metals. The method for detecting the content of the heavy metals in the aquatic product has the advantages of convenience in operation, short heavy metal extraction time, high extraction purity, sensitive and accurate detection and the like, and is practically significant for improving food safety, and the content of the heavy metals in the aquatic product can be accurately, conveniently and efficiently detected.

Description

[0001] technical field [0002] The invention relates to the technical field of aquatic product detection, in particular to a method for detecting heavy metal content in aquatic products. Background technique [0003] my country is a big country in the production and consumption of aquatic products. In recent years, due to serious environmental pollution, the content of metal elements in aquatic products has exceeded the standard. In order to ensure the health and life safety of the people, it is necessary to measure the content of metal elements in aquatic products. . However, the current detection methods in my country have problems such as low extraction efficiency of metal elements, small amount of extraction and low detection accuracy, which lead to major hidden dangers in the safety of aquatic products. Contents of the invention [0004] The technical problem mainly solved by the present invention is to provide a method for detecting heavy metal content in aquatic pr...

Claims

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Application Information

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IPC IPC(8): G01N21/64G01N1/44
Inventor 沈建明
Owner SUZHOU YANGCHENGHU MODERN AGRI INDPARK SPECIAL AQUACULTURE
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