Quantitation of polystyrene by pyrolysis-GC-MS: The impact of polymer standards on micro and nanoplastic analysis

IF 5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Polymer Testing Pub Date : 2024-07-10 DOI:10.1016/j.polymertesting.2024.108511

M. Brits , B. van Poelgeest , W. Nijenhuis , M.J.M. van Velzen , F.M. Béen , G.J.M. Gruter , S.H. Brandsma , M.H. Lamoree

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Abstract

The analytical method for detecting and quantifying micro and nanoplastics (MNPs) using Pyrolysis-Gas Chromatography-Mass Spectrometry (Py-GC-MS) is evolving and continuously refined. The requirement for accurate analytical methods faces challenges during method validation due to the scarcity of relevant reference materials. Additionally, the wide array of polymer types and their diverse characteristics further complicate this validation process. This study evaluated the impact of using diverse polystyrene (PS) standards with different molecular weights, polydispersity indexes, tacticity, endcapping, and chain branching, on quantifying the mass concentration of PS in various products. The results for the PS-based products showed inconsistencies across different standards, indicating that the measurements for a single product varied substantially when different polystyrene (PS) standards were applied. The influence of sample quantity on pyrolysis revealed differences in the ratios of pyrolysis products among various PS standards and different sample amounts. This research emphasizes the complexities involved in the precise quantification of polymers using Py-GC-MS. It provides valuable insights crucial for quantitative MNP analysis, highlighting the need for refined calibration strategies and standardised reference materials to improve the reliability of the MNP analysis method.

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通过热解-气相色谱-质谱法定量聚苯乙烯：聚合物标准对微观和纳米塑料分析的影响

使用热解-气相色谱-质谱法（Py-GC-MS）检测和定量微塑料和纳米塑料（MNPs）的分析方法在不断发展和完善。由于相关参考材料的缺乏，在方法验证过程中，对精确分析方法的要求面临挑战。此外，聚合物种类繁多，特性各异，使验证过程更加复杂。本研究评估了使用不同分子量、多分散指数、触感、端盖和链分支的聚苯乙烯（PS）标准物质对量化各种产品中 PS 质量浓度的影响。不同标准的聚苯乙烯基产品的测量结果并不一致，这表明当使用不同的聚苯乙烯（PS）标准时，单个产品的测量结果差异很大。样品量对热解的影响表明，不同 PS 标准和不同样品量的热解产物比例存在差异。这项研究强调了使用 Py-GC-MS 精确定量聚合物的复杂性。它提供了对 MNP 定量分析至关重要的有价值的见解，强调了改进校准策略和标准化参考材料的必要性，以提高 MNP 分析方法的可靠性。

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来源期刊

Polymer Testing 工程技术-材料科学：表征与测试

CiteScore

10.70

自引率

5.90%

发文量

328

审稿时长

44 days

期刊介绍： Polymer Testing focuses on the testing, analysis and characterization of polymer materials, including both synthetic and natural or biobased polymers. Novel testing methods and the testing of novel polymeric materials in bulk, solution and dispersion is covered. In addition, we welcome the submission of the testing of polymeric materials for a wide range of applications and industrial products as well as nanoscale characterization. The scope includes but is not limited to the following main topics: Novel testing methods and Chemical analysis • mechanical, thermal, electrical, chemical, imaging, spectroscopy, scattering and rheology Physical properties and behaviour of novel polymer systems • nanoscale properties, morphology, transport properties Degradation and recycling of polymeric materials when combined with novel testing or characterization methods • degradation, biodegradation, ageing and fire retardancy Modelling and Simulation work will be only considered when it is linked to new or previously published experimental results.