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Methods for microplastic sampling and analysis in the seawater and fresh water environment
Summary
This review summarized and compared sampling and analysis methods for microplastics in marine and freshwater environments — including trawls, manta nets, pump filtration, FTIR, and Raman spectroscopy — and called for standardization to enable cross-study comparisons of pollution levels.
Microplastic (plastic smaller than 5mm in size) is ubiquitous around the world both in the ocean and the freshwater system. Due to their potential serious negative impact on marine organisms and human beings, marine microplastics have attracted worldwide attention in the past decade. Information and knowledge of the spatial and temporal distribution of marine microplastics are crucial for accurately assessing our current and future environmental health conditions. This is also important for developing mitigation plans and measures to protect our environment. Since the measured microplastic pollution level is closely related to the sampling methods and identification techniques, it is important to employ standardized sampling and analysis operation procedures for cross-comparison. In this chapter, we present the basic sampling, sample pretreatment and microplastic identification techniques involved in microplastic pollution assessment and discuss the adaptability of different sampling and pretreatment methods. The pros and cons of different techniques are also discussed.