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使用热解气体染色学-质谱法测量土壤介质中的微塑料质量的实用方法

Elham Faraji¹, Patricia Cabedo-Sanz¹, Ajit K Sarmah¹

¹Department of Civil and Environmental Engineering, The Faculty of Engineering, The University of Auckland, New Zealand.

|December 2, 2025

概括

一种新的热解气色谱法/质谱法 (Py-GC/MS) 方法准确量化了土壤中的微塑料. 这种经过验证的技术为日常环境监测提供了高回收率和灵敏度.

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:

土壤中的微塑料污染给土壤带来了重大的分析挑战.
精确量化微塑料对于了解环境影响至关重要.
现有的方法往往缺乏对不同土壤类型的敏感性或适用性.

研究的目的:

开发和验证一种可靠的方法来量化土壤中的微塑料质量.
针对聚乙烯 (PE),聚烯 (PP) 和聚烯 (PS) 等常见的聚合物.
评估该方法在各种土壤矩阵中的性能及其对环境样本的适用性.

主要方法:

使用热解气色谱/质谱 (Py-GC/MS) 来测量聚合物质量.
采用冷加工来增强样本的一致性和提高量化准确性.
集成的富里埃变换红外光谱仪 (FTIR) 用于聚合物识别确认.

主要成果:

实现了低检测极限 (0.020.44μg) 和高线性 (R2 > 0.995).
证明了高回收率:86.1% (砂岩),90.7% (粘土) 和99.6% (砂岩-粘土).
FTIR证实了高达85%的精度的聚合物同一性;Py-GC/MS实现了高达90%的量化精度.

结论:

经过验证的Py-GC/MS方法提供了一种敏感且可重复的方法,用于在不同类型的土壤中量化微塑料.
低温磨粉和FTIR集成提高了该方法的准确性和可靠性.
该协议适用于环境土壤样本中的常规微塑料监测,如在城市和农业土壤中证明的那样.

关键词:

美国的FTIR是FTIR.大量量化量化的量化量.微塑料是一种微塑料.微塑料的提取方法在Py-GC/MS中使用.土壤介质的土壤介质.

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