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通过与MALS和UV-Vis探测器相结合的不对称流场流量分数在水性矩阵中分离聚乙烯纳米塑料的验证方法

Iris H Valido¹, Victor Fuentes-Cebrian¹, Alba Hernández²

¹GTS Research Group, Department of Chemistry, Faculty of Science, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193, Barcelona, Spain.

Mikrochimica acta

|July 7, 2023

概括

鉴别纳米塑料 (NPLs) 由于其潜在的毒性至关重要. 这项研究开发并验证了一种可靠的NPL大小分析方法,改进了环境安全评估.

科学领域:

环境科学环境科学
分析化学分析化学
材料科学材料科学材料科学

背景情况:

纳米塑料 (NPLs) 由于其小尺寸和潜在的毒性,造成环境和健康风险.
由于缺乏经过验证的方法和参考材料,NPLs的表征受到阻碍.
无效污染物可以作为有机和无机污染物的载体,增加它们对环境的影响.

研究的目的:

开发和验证一个强大的分离和尺寸表征纳米塑料的方法.
解决对纳米尺寸范围内的NPLs可靠分析技术的需求.
提供一个验证的方法来量化纳米塑料,这对于环境监测至关重要.

主要方法:

采用非对称流域流量分成 (AF4) 与多角度光散射 (MALS) 和紫外可见光 (UV-Vis) 检测相结合.
开发了聚乙烯纳米球的分离和尺寸表征技术.
验证了30至490纳米的粒子大小的方法.

主要成果:

在30-490nm范围内实现了纳米塑料尺寸表征的验证方法.
证明该方法的偏差低 (95-109%) 和高精度 (1-18%).
对于两个探测器来说,已建立低检测极限 (LOD < 0.2 μg) 和量化极限 (LOQ < 0.3 μg).
展示了方法稳定性,在100多项分析中获得可重现的结果.

结论:

开发的AF4-MALS-UV方法是用于纳米塑料尺寸表征的经过验证和可靠的工具.
这种方法克服了当前NPL分析的局限性,提供了准确的量化和大小分布.
验证的技术支持环境风险评估和对纳米塑料污染的监测.

关键词:

在AF4-MALS-UV中使用.纳米塑料是一种纳米塑料.聚乙烯是一种聚乙烯.参考标准参考标准是指参考标准.球体是一个球体.验证验证验证验证

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