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首页> 外文期刊>Environmental toxicology and chemistry >Microwave‐Assisted Extraction for Quantification of Microplastics Using Pyrolysis–Gas Chromatography/ Mass Spectrometry
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Microwave‐Assisted Extraction for Quantification of Microplastics Using Pyrolysis–Gas Chromatography/ Mass Spectrometry

机译：使用热解 - 气相色谱/质谱法测量微波辅助提取微型塑料塑料

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摘要

Microplastics are now recognized as a persistent and global pollutant. To quantitively measure microplastics in environmental matrices, several techniques are used including new methods using pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS). In the present study, a new extraction method using microwave-assisted extraction (MAE) combined with Py-GC/MS was developed to extract and quantify a wide range of plastic polymers, and the method was validated using different environmental matrices. This new extraction method was able to extract polyethylene, polystyrene, polypropylene, poly(methyl-methacrylate) (PMMA), polyvinylchloride (PVC), and polycarbonate in dichloromethane with good recoveries (92.9-119.7%). The limit of detection and limit of quantification (LOQ) of the method ranged from 0.002 to 0.18 mu g and from 1.2 to 5.8 mu g, respectively. Intra- and interday repeatability values with coefficients of variation less than 25% for all polymers were obtained. Method validation also included a spike and recovery using all polymers from clean water, dirty water, and shrimp and salmon fillet samples, with recoveries of 85 to 111, 87 to 138, 81 to 122, and 50 to 151%, respectively. Finally, the method was tested on unspiked wild mussels and bottled water for proof-of-concept. Both polyethylene and PVC were detected and quantified in mussels, and polycarbonate and polypropylene were detected below the LOQ. For bottled water, polypropylene, polystyrene, and polycarbonate were all detected below the LOQ. We introduce a method combining MAE and Py-GC/MS as a tool for mass quantification of microplastics. This method can be used as a stand-alone, or as a complementary method to spectroscopic techniques. Environ Toxicol Chem 2021;00:1-9. (c) 2021 SETAC
机译：Micoplastics现在被认为是一种持续和全球污染物。为了定量测量环境基质中的微薄塑料，使用几种技术，包括使用热解 - 气相色谱/质谱（Py-GC / MS）的新方法。在本研究中，开发了使用微波辅助萃取（MAE）的新提取方法与Py-GC / MS结合以提取和量化各种塑料聚合物，并使用不同的环境基质验证该方法。这种新的提取方法能够提取聚乙烯，聚苯乙烯，聚丙烯，聚（甲基 - 甲基丙烯酸甲酯）（PMMA），聚氯乙烯（PVC），在二氯甲烷中的聚碳酸酯，具有良好的回收率（92.9-119.7％）。方法的检测极限和定量限制（LOQ）分别为0.002至0.18μg，分别为1.2至5.8μg。获得与所有聚合物的变异系数的间隔和间之间的可重复值均得到小于25％。方法验证还包括使用来自清洁水，脏水和虾和鲑鱼片样品的所有聚合物的尖峰和恢复，其中回收率为85至111,87至138,81至122和50-151％。最后，该方法在未加工的野贻贝上进行了测试，并瓶装水进行验证。在贻贝中检测和定量聚乙烯和PVC，并在LOQ以下检测聚碳酸酯和聚丙烯。对于瓶装水，聚丙烯，聚苯乙烯和聚碳酸酯全部检测到LOQ以下。我们介绍了一种将MAE和PY-GC / MS组合为微型塑料的刀具的方法。该方法可以用作独立的，或作为光谱技术的互补方法。环境毒素化学2021; 00：1-9。 （c）2021 Setac

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