Method for measuring content of heavy metals in edible mushrooms by ICP-AES (inductively coupled plasma-atomic emission spectrometry)

An ICP-AES, edible fungus technology, applied in material excitation analysis, thermal excitation analysis, etc., can solve the problem of heavy metal exceeding the standard content cannot be measured, and achieve the effect of ensuring physical health, high measurement accuracy, and wide linear range.

Inactive Publication Date: 2015-09-30
SHENYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention is aimed at solving the above problems, and mainly solves the technical problem that the specific content of pesticide residues and heavy metals exceeding the standard in the edible fungus existing in the prior art cannot be measured.

Method used

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  • Method for measuring content of heavy metals in edible mushrooms by ICP-AES (inductively coupled plasma-atomic emission spectrometry)
  • Method for measuring content of heavy metals in edible mushrooms by ICP-AES (inductively coupled plasma-atomic emission spectrometry)
  • Method for measuring content of heavy metals in edible mushrooms by ICP-AES (inductively coupled plasma-atomic emission spectrometry)

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Embodiment 1

[0028] A method utilizing ICP-AES to measure heavy metal content in edible fungi, the specific implementation steps of the method:

[0029] 1 Experimental materials

[0030] 1.1 Main instruments and working parameters

[0031] DRE inductively coupled plasma atomic emission spectrometer (Leeman, USA) was used. Power 1.0kW, argon pressure 0.55Mpa, cooling gas flow 15L min -1 , atomizing gas pressure 379.211kPa, lifting volume 1.5mL min -1 , and the observation position is automatically optimized.

[0032] Ultrapure water device (Airum611di) (Sartorius, Germany).

[0033] Electronic balance (B211D) (Sartorius, Germany).

[0034] 1.2 Main reagents

[0035] Nitric acid, hydrogen peroxide (both high grade pure)

[0036] Standard stock solution: the standard solution of Ni, Cr, Pb, Cd, As, Hg is 1000μg·mL -1 National Nonferrous Metals and Electronic Materials Analysis and Testing Center.

[0037] 2.1 Sample pretreatment

[0038] The shiitake mushroom samples were first wash...

Embodiment 2

[0051] A method utilizing ICP-AES to measure heavy metal content in edible fungi, the specific implementation steps of the method:

[0052] 1 Experimental materials

[0053] 1.1 Main instruments and working parameters

[0054] DRE inductively coupled plasma atomic emission spectrometer (Leeman, USA) was used. Power 1.0kW, argon pressure 0.55Mpa, cooling gas flow 15L min -1 , atomizing gas pressure 379.211kPa, lifting volume 1.5mL min -1 , and the observation position is automatically optimized.

[0055] Ultrapure water device (Airum611di) (Sartorius, Germany).

[0056] Electronic balance (B211D) (Sartorius, Germany).

[0057] 1.2 Main reagents

[0058] Nitric acid, hydrogen peroxide (both high grade pure)

[0059] Standard stock solution: the standard solution of Ni, Cr, Pb, Cd, As, Hg is 1000μg·mL -1 National Nonferrous Metals and Electronic Materials Analysis and Testing Center.

[0060] 2.1 Sample pretreatment

[0061] The Coprinus comatus sample was first washed wi...

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Abstract

The invention discloses a method for measuring the content of heavy metals in edible mushrooms by ICP-AES (inductively coupled plasma-atomic emission spectrometry), and mainly solves the technical problems that the specific contents of pesticide residues and overproof heavy metals in the edible mushrooms cannot be measured. The method is implemented by the following steps: 1, preparing an experimental material; and 2, pre-treating a sample, preparing a standard solution, measuring working parameters of an instrument, constructing a standard curve and measuring the sample, wherein under the conditions, by adoption of the ICP-AES method, the content of the heavy metals in a mushroom solution is measured; each sample is measured for three times in parallel, and then an average value is calculated; and the contents of all elements in the edible mushrooms can be obtained by carrying out unit conversion on measured data. The measurement method is scientific, accurate, high in measurement precision, quick in measurement and wide in linear range and has the advantages of measuring various elements simultaneously and the like. By the method for measuring harmful substances, poisonous and harmful edible mushrooms can be prevented from entering the market, and the development of an edible mushroom cultivation technology is promoted; and therefore, the method disclosed by the invention has a good popularization prospect.

Description

Technical field: [0001] The invention relates to a method for measuring the content of heavy metals in edible fungi, specifically a method for measuring the content of heavy metals in edible fungi by using ICP-AES, and belongs to the technical field of material analysis. Background technique [0002] Since the early 1980s, edible fungus cultivation has developed rapidly in China as a good project with small investment, short cycle time and quick results. The edible fungus industry is a short-term and fast rural economic development project integrating economic benefits, ecological benefits and social benefits. Edible fungi are also a kind of organic, nutritious and healthy green food. Compared with other crops, it started late and took a short time, but it has a fast growth rate and a large development area. Therefore, the foundation is poor, there are many problems, and the quality and benefits are not stable enough. In particular, pesticide residues and harmful heavy metal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/71
Inventor 李国德辛士刚李娜王升厚武士威
Owner SHENYANG NORMAL UNIV
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