Method for determining heavy metal content in edible packaging material

A technology for packaging materials and heavy metals, applied in measuring devices, analytical materials, color/spectral characteristics measurement, etc., can solve problems such as detection of heavy metal content in edible packaging materials, liver and bone hazards, visceral toxicity, etc., to improve food safety Performance, improvement of drying effect, effect of accelerating drying rate

Inactive Publication Date: 2019-04-26
新疆出入境检验检疫局检验检疫技术中心 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have shown that the accumulation of heavy metal elements in the human body to a certain amount will have a certain toxic effect on the internal organs of the human body. Long-term consumption of foods with excessive heavy metal content will cause harm to the liver and bones of the human body
Edible packaging materials are mainly made of natural edible substances, which easily contain heavy metal elements, causing potential harm to the human body during use, but there is no detection of heavy metal content in edible packaging materials in the prior art method

Method used

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  • Method for determining heavy metal content in edible packaging material

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Effect test

Embodiment 1

[0038] Embodiment 1 of the present invention discloses a method for measuring the content of heavy metals in edible packaging materials, which specifically includes the following steps:

[0039] (1) First crush the edible packaging material until the particle size is less than 100 mesh, and then dry it at 75°C for 5 hours;

[0040] (2) First mix the nitric acid solution with a mass concentration of 65% and the hydrogen peroxide with a mass concentration of 25% according to a volume ratio of 1:2 to obtain a digestion solution; then place the dried edible packaging material in a clean and dry place Add the digestion solution to the polytetrafluoroethylene pressure digestion tank for digestion treatment to obtain the solution to be tested; the conditions of the digestion treatment process are: first raise the temperature to 90 °C at a heating rate of 20 °C / min, and keep it warm for 4 minutes; then Continue to heat up to 115°C at a heating rate of 20°C / min, and keep warm for 3 min...

Embodiment 2

[0048] Embodiment 2 of the present invention discloses a method for measuring the content of heavy metals in edible packaging materials, which specifically includes the following steps:

[0049] (1) First crush the edible packaging material until the particle size is less than 100 mesh, and then dry it at 90°C for 3 hours;

[0050] (2) First, the nitric acid solution with a mass concentration of 65 to 75% and the hydrogen peroxide with a mass concentration of 25 to 35% are mixed according to a volume ratio of 2:3 to obtain a digestion solution; then the dried edible packaging material is placed In a clean and dry polytetrafluoroethylene pressure digestion tank, add digestion solution for digestion to obtain the solution to be tested; the conditions for the digestion process are: first raise the temperature to 100°C at a heating rate of 20°C / min, and keep it warm 4min; then 125°C, and keep warm for 5min; then continue to heat up to 175°C at a heating rate of 30°C / min, and keep ...

Embodiment 3

[0058] Embodiment 3 of the present invention discloses a method for measuring the content of heavy metals in edible packaging materials, which specifically includes the following steps:

[0059] (1) First crush the edible packaging material until the particle size is less than 100 mesh, and then dry it at 85°C for 4 hours;

[0060] (2) First mix the nitric acid solution with a mass concentration of 70% and the hydrogen peroxide with a mass concentration of 30% according to a volume ratio of 1:3 to obtain a digestion solution; then place the dried edible packaging material in a clean and dry place In the PTFE pressure digestion tank, add digestion solution for digestion treatment to obtain the solution to be tested; the conditions of the digestion treatment process are: first raise the temperature to 95 °C at a heating rate of 20 °C / min, and keep it for 5 minutes; then 120 °C ℃, and keep warm for 4min; then continue to heat up to 173℃ at a heating rate of 30℃ / min, and keep warm...

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Abstract

The invention discloses a method for determining the heavy metal content in an edible packaging material. The method comprises the following steps: (1) sequentially pulverizing and drying the edible packaging material; (2) putting the dried edible packaging material after drying in a clean and dry polytetrafluoroethylene pressure digestion tank, then adding digestion solution for digestion treatment, and obtaining a solution to be determined; (3) conducting qualitative and quantitative analysis on heavy metals in the solution to be determined by adopting a flame atomic absorption spectrophotometer. The method utilizes the flame atomic absorption spectrophotometer to conduct trace detection on the heavy metals in the edible packaging material, can quickly, effectively and accurately determine the heavy metal content in the edible packaging material, accordingly effectively prevents heavy metal polluted edible packaging materials from being circulated on the market and improves food safety performance.

Description

technical field [0001] The invention relates to the technical field of component determination of packaging materials, in particular to a method for determining the content of heavy metals in edible packaging materials. Background technique [0002] With the development of packaging technology, edible food packaging materials have been widely used and developed as a green packaging material. Edible packaging materials refer to packaging materials that meet the functional requirements of protecting the integrity of food appearance, hygiene, and safety, and are non-polluting to the environment and food; they are based on protein, starch, polysaccharides, plant fibers, edible glue, and other natural substances Natural edible substances that can be digested and absorbed by the human body are used as the main raw material, and a packaging film with a porous network structure is formed through the interaction between different molecules. It has many advantages such as good qualit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31
CPCG01N21/3103
Inventor 刘俊杨忠姚海军李勇马龙赵林同李刚陈婷婷
Owner 新疆出入境检验检疫局检验检疫技术中心
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