场流分馏
纳米
粒子(生态学)
粒度分布
纳米粒子跟踪分析
粒径
聚苯乙烯
光散射
纳米颗粒
纳米技术
气溶胶
分析化学(期刊)
化学
分辨率(逻辑)
散射
材料科学
航程(航空)
光学
分馏
色谱法
聚合物
物理
小RNA
有机化学
复合材料
人工智能
物理化学
地质学
海洋学
基因
生物化学
计算机科学
微泡
作者
Fanny Caputo,Robert Vogel,John R. K. Savage,Gabriele Vella,Alice Y.S. Law,Giacomo Della Camera,Gary Hannon,Ben Peacock,Dóra Méhn,Jessica Ponti,Otmar Geiss,Dimitri Aubert,Adriele Prina‐Mello,Luigi Calzolai
标识
DOI:10.1016/j.jcis.2020.12.039
摘要
The implementation of the proposal from the European Chemical Agency (ECHA) to restrict the use of nanoplastics (NP) and microplastics (MP) in consumer products will require reliable methods to perform size and mass-based concentration measurements. Analytical challenges arise at the nanometre to micrometre interface, e.g., 800 nm–10 µm, where techniques applicable at the nanometre scale reach their upper limit of applicability and approaches applicable at the micrometre scale must be pushed to their lower limits of detection. Herein, we compared the performances of nine analytical techniques by measuring the particle size distribution and mass-based concentration of polystyrene mixtures containing both nano and microparticles, with the educational aim to underline applicability and limitations of each technique. Light scattering-based measurements do not have the resolution to distinguish multiple populations in polydisperse samples. Nanoparticle tracking analysis (NTA), nano-flowcytometry (nFCM) and asymmetric flow field flow fractionation hyphenated with multiangle light scattering (AF4-MALS) cannot measure particles in the micrometre range. Static light scattering (SLS) is not able to accurately detect particles below 200 nm, and similarly to transmission electron microscopy (TEM) and flow cytometry (FCM), is not suitable for accurate mass-based concentration measurements. Alternatives for high-resolution sizing and concentration measurements in the size range between 60 nm and 5 µm are tunable resistive pulse sensing (TRPS) and centrifugal liquid sedimentation (CLS), that can bridge the gap between the nanometre and micrometre range.
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