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Development and Validation of an Efficient Method for Processing Microplastics in Biota Samples

机译：生物脂省样品中微塑料的高效方法的开发与验证

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摘要

The impacts of microplastics on aquatic ecosystems and biota are gaining attention globally. Although microplastics have been widely detected in biota, there currently are few standardized detection and identification methods. The present study developed a novel one-step digestion method which was evaluated with mussel and fish samples. This method employed nitric acid and hydrogen peroxide (HNO3:H2O2 = 4:1 by volume) as digestion reagents, which completely digested biota samples 5 g weight within 30 min at 50 degrees C. A density separation step was subsequently used to remove organic residues as necessary. The efficiency and suitability of this method were tested by spiking microplastics of 7 different types and of various sizes (1000, 900, 675, 300, 250, and 150 mu m) into mussel and gastrointestinal tracts of fish. The recoveries of microplastics ranged from 90 to 100%. No significant changes in weight, surface area, and particle size (t test, p 0.05) were observed for all tested polymers. Fourier transform infrared spectral analyses demonstrated that the method did not degrade any of the polymers except for polyethylene terephthalate. The method was demonstrated with mussel and fish samples collected from the Pearl River delta, south China, and was able to recover microplastics effectively. Overall, the present method is time-saving and easy to operate, with low procedural cross-contamination. The properties of microplastics recovered by the present method remained largely intact, greatly benefiting subsequent qualitative and quantitative analyses. Environ Toxicol Chem 2019;38:1400-1408. (c) 2019 SETAC
机译：微塑料对微生物生态系统和生物群的影响在全球上越来越关注。虽然在Biota中已被广泛检测到微塑料，但目前有很少的标准化检测和鉴定方法。本研究开发了一种新的一步消化方法，用贻贝和鱼类进行评估。该方法使用硝酸和过氧化氢（HNO 3：H 2 O 2 = 4：1体积）作为消化试剂，其在50℃下将其在30分钟内完全消化的Biota样品<5g重量。密度分离步骤随后用于除去有机物残留物必要。通过掺入7种不同类型和各种尺寸（1000,900,675,300,250和150μm）的微型塑料测试来测试该方法的效率和适用性，进入贻贝和鱼类的胃肠道。微薄的回收率范围为90至100％。对于所有测试的聚合物，观察到重量，表面积和粒度和粒度（T试验，P> 0.05）没有显着变化。傅里叶变换红外光谱分析证明，除了聚对苯二甲酸乙二醇酯外，该方法没有降解任何聚合物。该方法用南方珠江三角洲珠江三角洲收集的贻贝和鱼类样品证明，能够有效地恢复微塑料。总的来说，目前的方法是节省时间且易于操作，具有低程序交叉污染。本方法回收的微塑料的性质在很大程度上完好无损，大大受益于后续的定性和定量分析。环境毒素科学2019; 38：1400-1408。 （c）2019 Setac

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  • 来源
    《Environmental toxicology and chemistry》 |2019年第7期|1400-1408|共9页
  • 作者

    Yu Zimin; Peng Bo; Liu Liang-Ying; Wong Charles S.; Zeng Eddy Y.;

  • 作者单位

    Jinan Univ Sch Environm Guangzhou Guangdong Peoples R China|Jinan Univ Guangdong Key Lab Environm Pollut & Hlth Guangzhou Guangdong Peoples R China;

    Jinan Univ Sch Environm Guangzhou Guangdong Peoples R China|Jinan Univ Guangdong Key Lab Environm Pollut & Hlth Guangzhou Guangdong Peoples R China;

    Jinan Univ Sch Environm Guangzhou Guangdong Peoples R China|Jinan Univ Guangdong Key Lab Environm Pollut & Hlth Guangzhou Guangdong Peoples R China;

    Jinan Univ Sch Environm Guangzhou Guangdong Peoples R China|Jinan Univ Guangdong Key Lab Environm Pollut & Hlth Guangzhou Guangdong Peoples R China|Univ Winnipeg Richardson Coll Environm Winnipeg MB Canada;

    Jinan Univ Sch Environm Guangzhou Guangdong Peoples R China|Jinan Univ Guangdong Key Lab Environm Pollut & Hlth Guangzhou Guangdong Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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