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Method for determining content of microplastics in seawater and organism-absorbed microplastics

A determination method and microplastic technology, applied in the field of environmental pollutant detection, can solve the problems of complex operation steps, high measurement cost, inability to know the relationship between microplastics content and microplastics, etc.

Active Publication Date: 2018-04-27
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] "DB21T 2751-2017 Determination of Microplastics in Seawater by Fourier Transform Microscopic Infrared Spectroscopy" stipulates a method for the determination of microplastics in seawater, but this method has complicated steps and high measurement costs
[0004] Due to the high sensitivity and selectivity of fluorescent tracer technology, the patent application with application publication number CN 105651748A discloses a method for quantitatively analyzing the enrichment and distribution of microplastics in aquatic organisms; After the microplastic liquid, the biological poisoning experiment was carried out
In the above process, the microplastics need to be fluorescently labeled before being put into the poisoned substance solution system, and the relationship between the content of microplastics in the real water environment and the absorption of microplastics in the water environment by organisms cannot be known.

Method used

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  • Method for determining content of microplastics in seawater and organism-absorbed microplastics
  • Method for determining content of microplastics in seawater and organism-absorbed microplastics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Step 1. Stir 3 parts of methylphenyl silicone resin, 3 parts of polyurethane and 12 parts of calcium halophosphate phosphor at 120° C. for 40 minutes to form a mixture M1;

[0032] Step 2. Add 1.5 parts of divinylbenzene to the mixture M1, and stir at 100° C. for 30 minutes to form a mixture M2;

[0033] Step 3: Add 2 parts of gelatin to the mixture M2 at 60°C, and stir for 40 minutes to form a mixture M3;

[0034] Step 4. After drying the mixture M3, grind and sieve to make a powder with a diameter of 0.5mm-1.2mm to obtain a viscous phosphor material.

Embodiment 2

[0036] Step 1. Stir 5.8 parts of methylphenyl silicone resin, 4.5 parts of polyurethane and 16 parts of calcium halophosphate phosphor at 130° C. for 45 minutes to form a mixture M1;

[0037] Step 2. Add 2.5 parts of divinylbenzene to the mixture M1, and stir at 110° C. for 35 minutes to form a mixture M2;

[0038] Step 3: Add 5 parts of gelatin to the mixture M2 at 65°C, and stir for 45 minutes to form a mixture M3;

[0039] Step 4. After drying the mixture M3, grind and sieve to make a powder with a diameter of 0.5mm-1.2mm to obtain a viscous phosphor material.

Embodiment 3

[0041] Step 1. Stir 4.5 parts of methylphenyl silicone resin, 6 parts of polyurethane and 13 parts of calcium halophosphate phosphor at 125°C for 50 minutes to form a mixture M1;

[0042] Step 2. Add 3 parts of divinylbenzene to the mixture M1, and stir at 100° C. for 35 minutes to form a mixture M2;

[0043] Step 3: Add 4.5 parts of gelatin to the mixture M2 at 70°C, and stir for 50 minutes to form a mixture M3;

[0044] Step 4. After drying the mixture M3, grind and sieve to make a powder with a diameter of 0.5mm-1.2mm to obtain a viscous phosphor material.

[0045] In the above-mentioned embodiment, methyl phenyl silicone resin, polyurethane and gelatin are used to react with fluorescent powder at high temperature, and an adhesive film can be formed on the surface of fluorescent powder, which can resist polyethylene, polypropylene , polyvinyl chloride, polystyrene, polyurethane, polyamide, polyethylene terephthalate and other microplastics have good selective binding effec...

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Abstract

The invention provides a method for determining the content of microplastics in seawater and organism-absorbed microplastics, wherein the method includes the following steps: collecting seawater in anenvironment into a container; placing a fluorescent powder material having stickiness in the container, stirring, and carrying out fluorescence labeling of the microplastics in the seawater; adding acertain amount of seawater-density solution, and stirring; removing a static sediment at the bottom of the container, and determining the concentration of the fluorescent microplastics in the seawater by a fluorescence spectrometer; placing living marine organisms in a container, and culturing for a period of time; removing the living marine organisms, and then determining the concentration of the fluorescent microplastics in the seawater in the container by the fluorescence spectrometer; and dissecting the living marine organisms, collecting target tissues and organs, and determining the concentration of the fluorescent microplastics in various target tissues and organs. The method provided by the invention can accurately detect the content of the microplastics in the seawater environment and the absorption condition of the organisms on the microplastics in the environment, and has positive significance on protection of the environment and treatment of the microplastics.

Description

technical field [0001] The invention relates to the field of environmental pollutant detection, in particular to a method for measuring the content of microplastics in seawater and the microplastics absorbed by organisms. Background technique [0002] We all know the important role that the material plastic plays in today's life. While various plastic products bring various conveniences to people's lives, they also bring various potential health risks, the most prominent of which is that plastic products will undergo certain physical, chemical and biological effects after being discarded. Plastic particles that become smaller and smaller - microplastics, microplastics are usually plastic particles with a particle size of less than 5 mm. This kind of plastic particles will not be degraded by the natural environment, but will always remain in the environment, and even enter the organism, posing environmental health risks. In the process of evaluating the health risks of micr...

Claims

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Application Information

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IPC IPC(8): G01N15/06G01N21/64
CPCG01N15/06G01N21/643G01N21/6486G01N2021/6417G01N15/075
Inventor 蔡明刚陈斌
Owner XIAMEN UNIV
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