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在环境样本中分辨和同时量化聚乙烯二甲和聚乙烯二甲的微塑料,采用气体染色学-双重质谱法

Liqiang Lu¹, Jiahui Tong¹, Han Wang¹

¹Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, 430074, PR China.

Mikrochimica acta

|June 13, 2024

概括

一种新方法通过将聚乙烯二甲 (PET) 和聚乙烯二甲 (PBT) 微塑料分解成可测量的产品来量化. 这种技术在环境样本中提供了准确的检测,无需复杂的预分离步骤.

科学领域:

环境科学环境科学
分析化学分析化学
聚合物科学聚合物科学

背景情况:

聚乙烯二甲 (PET) 和聚乙烯二甲 (PBT) 造成的微塑料污染是一个日益严重的环境问题.
在环境矩阵中精确量化这些微塑料对于风险评估至关重要.
现有的微塑料分析方法往往涉及复杂且耗时的分离程序.

研究的目的:

开发和验证一种用于同时量化PET和PBT微塑料的新方法.
为了使微塑料分析而不需要复杂的分离过程.
为环境微塑料的确定提供可靠的分析方案.

主要方法:

将PET和PBT微塑料脱聚合成特有的单体:乙烯基醇和1,4-butanediol.
使用气体染色学-并联质谱法 (GC-MS/MS) 量化脱聚合产品.
在环境样本中建立校准曲线并通过和回收实验进行验证.

主要成果:

在最佳的脱聚合条件下,可以有效地将PET转化为乙烯糖醇 (78%) 和PBT转化为1,4-butanediol (87%).
在信号强度和聚合物质量之间观察到高线性,PET的相关系数为0.996,PBT的相关系数为0.997.
在环境水样中实现了稳定的回收率 (89-100%) 和低检测极限 (PET为4.95μg,PBT为1.39μg).

结论:

开发的GC-MS/MS方法允许在环境水样中直接和同时量化PET和PBT微塑料.
这种方法消除了复杂分离的需要,提供了更有效和更容易获得的分析方案.
该方法为监测和了解这些常见的微塑料在环境中的流行提供了一个强大的工具.

关键词:

脱聚合脱聚合方式气体染色学-并联质谱学质谱学聚乙烯四甲酸是什么?聚乙烯四甲酸是一种聚乙烯四甲酸.

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