Method for measuring heavy metal content of oyster based on hyperspectral image technology

A hyperspectral image and measurement method technology, applied in the field of oyster heavy metal content determination, can solve the problems of complex operation and long detection time, and achieve the effect of simple and fast operation and good test reproducibility

Inactive Publication Date: 2019-06-18
LINGNAN NORMAL UNIV
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Problems solved by technology

[0004] In order to overcome the technical defects of long detection time, complicated operation, sample pretreatment, and only applicable to the detection of single heavy metal pollution in the above-mentioned existing heavy metal detection method, the present invention provides an oyster heavy metal detection method based on hyperspectral image technology. Assay method

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  • Method for measuring heavy metal content of oyster based on hyperspectral image technology
  • Method for measuring heavy metal content of oyster based on hyperspectral image technology
  • Method for measuring heavy metal content of oyster based on hyperspectral image technology

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Embodiment 1

[0057] Such as figure 1 As shown, the method for determining heavy metal content in oysters based on hyperspectral image technology includes the following steps:

[0058] S1: Preparation of heavy metal contaminated samples;

[0059] S2: collect the hyperspectral image of each heavy metal contaminated sample through the hyperspectral image acquisition system;

[0060] S3: extract and preprocess spectral data according to the hyperspectral image;

[0061] S4: A band selection algorithm based on neighborhood information entropy, and obtain a subset of heavy metal ion sensitive characteristic bands according to spectral data;

[0062] S5: Construct a heavy metal ion content determination model based on extreme learning machine according to the heavy metal ion sensitive characteristic band subset;

[0063] S6: Input the hyperspectral data of the oyster sample to be tested into the heavy metal ion content determination model, and output the determination of the heavy metal conten...

Embodiment 2

[0099] More specifically, on the basis of Example 1, the oyster sample was adapted to the experimental conditions for about 10 days in a plastic pool with a length of 60 cm, a width of 40 cm, and a height of 30 cm, and the seawater used in the experiment was processed through 24 hours of settlement and soil filtration. It is used to keep oysters living in the tank. The pH value of the seawater is 8.05±0.1, the temperature is 20.8±2.6°C, the dissolved oxygen content is greater than 6mg / L, and the salinity is 21‰.

[0100] For the study of single heavy metal pollution in oysters, oyster samples were divided into five groups, and oyster samples in groups I, II, III, and IV were exposed to high concentrations of CdCl in water, respectively. 2 , PbCH 3 COO·3H 2 O, ZnSO 4 ·7H 2 O, CuSO 4 ·5H 2 Among the four reagents, group V (no pollution control) was cultured in seawater without adding any heavy metal elements. For the research on oyster complex heavy metal pollution, the oy...

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Abstract

The invention provides a method for measuring the heavy metal content of the oyster based on the hyperspectral image technology. The method comprises: preparing a heavy metal contaminated sample; collecting a hyperspectral image of the heavy metal contaminated sample by a hyperspectral image acquisition system; carrying out spectral data extraction and pretreatment; acquiring a heavy metal ion sensitive characteristic band subset; constructing a heavy metal ion content measurement model based on an extreme learning machine; and inputting hyperspectral data of a to-be-measured oyster sample into the heavy metal ion content measurement model and outputting measurement of the oyster heavy metal content. According to the provided method, the heavy metal ion sensitive characteristic band subsetis extracted and the heavy metal ion content measurement model is constructed to detect the heavy metal contamination content of the oyster. During the detection process, complicated pretreatment ofthe sample is avoided; and during the analysis process, no chemical reagent for assistance is required, so that the environment is protected from being polluted. And the complex pollution of several kinds of heavy metal can be analyzed simultaneously.

Description

technical field [0001] The invention relates to the technical field of heavy metal detection and the technical field of hyperspectral nondestructive testing, and more specifically, to a method for measuring heavy metal content in oysters based on hyperspectral image technology. Background technique [0002] With the rapid development of coastal industry and marine development, pollutants from various sources are directly discharged into the marine environment, resulting in increased pollution of the marine environment. According to the "2016 Guangdong Provincial Marine Environmental Status Bulletin" issued by the Guangdong Provincial Ocean and Fisheries Bureau, in 2016, the Pearl River, Rongjiang River, Lianjiang River, Shenzhen River, Huanggang River and other rivers carried a total of 2.2623 million tons of pollutants into the sea, of which heavy metals (copper, lead, zinc, cadmium, mercury) is 2,800 tons, and arsenic is 0.07 million tons. The heavy metals in the pollutan...

Claims

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Application Information

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IPC IPC(8): G01N21/25G06K9/62
Inventor 刘瑶王润涛王树文孟祥丽李明
Owner LINGNAN NORMAL UNIV
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