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Related Experiment Video

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Protocol for Microplastics Sampling on the Sea Surface and Sample Analysis
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A novel thermoanalytical method for quantifying microplastics in marine sediments.

Jia Lin1, Xiang-Po Xu1, Bei-Ying Yue1

  • 1Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-Sen University, Zhuhai 519082, China.

The Science of the Total Environment
|December 20, 2020
PubMed
Summary

A new thermoanalytical method accurately quantifies microplastics, even fine particles, in marine sediments. This technique measures microplastic-derived carbon (MPC) for reliable pollution assessment and understanding marine carbon storage contributions.

Keywords:
Marine sediment coreMicroplasticMicroplastic-derived carbon (MPC)Quantification methodThe Yellow Sea

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Area of Science:

  • Environmental Science
  • Analytical Chemistry
  • Marine Biology

Background:

  • Marine microplastic pollution poses significant ecological risks.
  • Accurate quantification of microplastics, especially fine-grained ones (<1 mm), is crucial for environmental assessment and management.
  • Existing methods face uncertainties in quantifying microplastic abundance, particularly for smaller particles.

Purpose of the Study:

  • To develop and validate a novel thermoanalytical method for the precise quantification of microplastics in marine samples.
  • To overcome the limitations of current methods in detecting and quantifying fine-grained microplastics.
  • To assess the practicability and reliability of the new method for analyzing microplastic pollution in natural marine sediments.

Main Methods:

  • A novel thermoanalytical approach was developed, focusing on measuring microplastic-derived carbon (MPC).
  • The method was validated using spiked samples containing known amounts of microplastics.
  • A case study was conducted on a sediment core (H43) from the Yellow Sea, spanning 1925-2009 CE.

Main Results:

  • The thermoanalytical method successfully quantified microplastics by measuring MPC, minimizing particle size limitations.
  • Validation with spiked samples confirmed the method's high reliability.
  • Application to a Yellow Sea sediment core demonstrated the technique's practicability for natural samples.

Conclusions:

  • The proposed thermoanalytical method offers a promising solution for accurately determining mass-related microplastic concentrations in marine sediments.
  • This technique can significantly improve the evaluation of marine pollution status.
  • The method provides a reliable means to assess the quantitative contribution of microplastics to marine carbon storage.