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Rapid analysis method of small-size microplastic in water sample

A rapid analysis, small size technology, applied in the field of environmental pollutant detection, can solve the problems of cumbersome operation steps, long analysis time, large water sample volume, etc., and achieve the effect of reducing analysis difficulty, reducing loss and increasing speed

Active Publication Date: 2020-01-03
EAST CHINA UNIV OF SCI & TECH
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Problems solved by technology

[0003]However, the analysis of these related water samples still has the problems of large sample volume, cumbersome operation steps, and long analysis time. analysis of microplastics, less analysis of smaller sizes

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[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the following will be clearly and completely described in conjunction with the technical solutions of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than Full examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0040] The invention provides a method for detecting the content of 20-100 μm microplastics in a water sample, comprising the following method steps,

[0041] Step a, shake the raw water of the leachate collected, and pre-screen the water sample with a cell sieve (aperture 110 μm, diameter 60 mm);

[0042] Step b, take 100ml of the pre-screened water sample, make 250ml mixed solution ...

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Abstract

The invention belongs to the field of environmental pollutant detection, and discloses a rapid analysis method of small-size microplastic in a water sample. The method comprises the steps of: a. firstly, performing primary screening on a collected water sample in a glass bottle; b. diluting filtrate obtained by the primary screening with high-purity water; c. digesting the remaining mixed solution(a portion of about 50ml is taken for the determination of conventional water quality parameters) with a hydrogen peroxide solution for more than 48h; d. performing vacuum filtering on the digested water sample by using a dual filter membrane system comprising glass fiber filter paper and a metal mesh filter membrane; e. drying the filtered metal mesh filter membrane for more than 24h; f. performing primary observation on the dried metal mesh filter membrane under an optical microscope; and g. performing observation, scanning, sample measurement, statistics and analysis on the metal mesh filter membrane by using a microscopic infrared system. The entire analysis method is easy to operate and short in time and provides a simple and effective new idea for the analysis of the small-size microplastic in the water sample.

Description

technical field [0001] The invention belongs to the field of environmental pollutant detection, in particular to a rapid detection method for small-sized microplastics in water samples, especially a method for detecting microplastics in a water body with a size range of 20-100 μm by using a microscopic infrared spectrum counting and characterization method method. Background technique [0002] Microplastics have been proposed as a new type of marine pollutant and have become one of the most concerned pollutants. Microplastics can persist in the environment due to their small size, physical characteristics of large specific surface area and unreactive chemical inertness. When they are adsorbed with toxic pollutants, there will be potential ecological hazards, which are harmful to animals, plants and humans. As a result, more and more studies in this area have been reported. Concern has also shifted from oceans to inland water systems, where it has been detected in lakes, ri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/14G01N1/34G01N21/01G01N21/3577
CPCG01N15/14G01N1/34G01N21/01G01N21/3577G01N2015/1481G01N2015/1486
Inventor 隋倩徐子茜
Owner EAST CHINA UNIV OF SCI & TECH
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