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室内空气中的微/纳米塑料的尺寸分辨识和量化使用热解气体染色学-离子移动性质谱法

Mahin Hashemihedeshi¹, Ethan Haywood¹, Daniel C Gatch²

¹Department of Chemistry, Memorial University of Newfoundland, 45 Arctic Avenue, St. John's, NL A1C 5S7, Canada.

Journal of the American Society for Mass Spectrometry

|January 19, 2024

概括

这项研究开发了一种新的方法来测量室内空气中的微小塑料颗粒,称为微/纳米塑料 (MNPs). 研究人员在实验室和家庭中发现了大量的MNP,特别是聚钢,这突显了吸入暴露的风险.

科学领域:

环境科学环境科学
分析化学分析化学
毒理学毒理学毒理学

背景情况:

人类通过吸入接触微型/纳米塑料 (MNP) 的情况越来越令人担忧.
对于在空气中的颗粒物中量化较小的MNP (<1微米) 存在有限的分析方法.
室内环境是人类暴露于空气中的微粒的重要场所.

研究的目的:

开发和验证一种用于识别和量化室内空气中微/纳米塑料 (MNP) 的新型分析方法.
在不同的室内环境中测量MNP度.
为了识别特定的MNP类型和室内空气中存在的相关塑料添加剂.

主要方法:

使用了一种新型的热解气体色谱循环离子流动性质谱仪 (pyr-GCxcIMS) 进行MNP分析.
采集大小分辨率空气中的颗粒物 (56 nm至18 μm) 使用级联冲击器.
针对四种常见的塑料类型 (PS,PE,PP,PMMA) 并进行了针对添加剂的非目标选.

主要成果:

在实验室 (47 ± 5 μg/m3对于<10 μm,27 ± 4 μg/m3对于<2.5 μm) 和住宅环境 (24 ± 3 μg/m3对于<10 μm,16 ± 2 μg/m3对于<2.5 μm) 中量化了MNP.
聚钢 (PS) 被确定为两种环境中最丰富的MNP类型.
检测到塑料添加剂,如TDCPP,与聚氨 (PU) 相对应,可能来自家具和绝缘材料.

结论:

通过使用先进的分析技术,提供了可量化的MNP在室内空气中的存在的第一个证据.
确定室内吸入是MNP和相关化学添加剂的重要暴露途径.
强调需要对MNP吸入暴露和健康影响进行进一步研究.

关键词:

循环离子流动性的周期性离子流动性.室内尘埃是什么意思室内尘埃是什么意思室内污染室内污染离子移动性质谱仪质谱仪微型/纳米塑料是一种塑料.持久性有机污染物持久性有机污染物

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