Identification and Quantification of Microplastics in the Marine Environment Using the Laser Direct Infrared (LDIR) Technique,Environmental Science & Technology

当前位置： X-MOL 学术 › Environ. Sci. Technol. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Identification and Quantification of Microplastics in the Marine Environment Using the Laser Direct Infrared (LDIR) Technique
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2022-06-24 , DOI: 10.1021/acs.est.1c08870
Mélanie Ourgaud ₁ , Nam Ngoc Phuong _{1,

2} , Laure Papillon ₁ , Christos Panagiotopoulos ₁ , François Galgani ₃ , Natascha Schmidt ₁ , Vincent Fauvelle ₁ , Christophe Brach-Papa ₃ , Richard Sempéré ₁

Affiliation

Here, we evaluate for the first time the performances of the newly developed laser direct infrared (LDIR) technique and propose an optimization of the initial protocol for marine microplastics (MPs) analysis. Our results show that an 8 μm porosity polycarbonate filter placed on a Kevley slide enables preconcentration and efficient quantification of MPs, as well as polymer and size determination of reference plastic pellets of polypropylene (PP), polyethylene (PE), polystyrene (PS), polyvinyl chloride (PVC), and polyethylene terephthalate (PET), with recoveries ranging from 80–100% and negligible blank values for particle sizes ranging from 200 to 500 μm. A spiked experiment using seawater, sediment, mussels, and fish stomach samples showed that the method responded linearly with significant slopes (R² ranging from 0.93–1.0; p < 0.001, p < 0.01). Overall, 11 polymer types were identified with limited handling and an analysis time of ca. 3 h for most samples and 6 h for complex samples. Application of this technique to Mediterranean marine samples (seawater, sediment, fish stomachs and mussels) indicated MP concentrations and size distribution consistent with the literature. A high predominance of PVC (sediment, fish stomachs) and PE and PP (seawater, mussels) was observed in the analyzed samples.

中文翻译：

使用激光直接红外 (LDIR) 技术识别和量化海洋环境中的微塑料

在这里，我们首次评估了新开发的激光直接红外 (LDIR) 技术的性能，并提出了优化海洋微塑料 (MPs) 分析的初始协议。我们的结果表明，放置在 Kevley 载玻片上的 8 μm 孔隙率聚碳酸酯过滤器能够对 MPs 进行预浓缩和有效量化，以及聚丙烯 (PP)、聚乙烯 (PE)、聚苯乙烯 (PS) 等参考塑料颗粒的聚合物和尺寸测定，聚氯乙烯 (PVC) 和聚对苯二甲酸乙二醇酯 (PET)，回收率范围为 80–100%，粒径范围为 200 至 500 μm 的空白值可忽略不计。使用海水、沉积物、贻贝和鱼胃样品进行的加标实验表明，该方法对显着斜率 ( R ²范围为 0.93–1.0；p < 0.001，p < 0.01）。总体而言，鉴定了 11 种聚合物类型，处理时间有限，分析时间约为大多数样品为 3 小时，复杂样品为 6 小时。将该技术应用于地中海海洋样品（海水、沉积物、鱼胃和贻贝）表明 MP 浓度和大小分布与文献一致。在分析的样品中观察到 PVC（沉积物、鱼肚）和 PE 和 PP（海水、贻贝）占主导地位。

更新日期：2022-06-24

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11