Luong Jim, Gras Ronda, Hua Yujuan, Liu Guangyu, Shellie Robert A
Dow Chemical Canada ULC, Highway 15, Fort Saskatchewan, Alberta, T8L 2P4, Canada.
Australian Centre for Research On Separation Science (ACROSS), University of Tasmania, Private Bag 75, Hobart, 7001, Australia.
Anal Bioanal Chem. 2023 May;415(13):2483-2492. doi: 10.1007/s00216-022-04424-6. Epub 2022 Nov 15.
An approach using pyrolysis with comprehensive two-dimensional gas chromatography with flame ionization detection is introduced for identifying common isolated plastic polymers. A quadrupole mass spectrometer is employed as a parallel detector to aid method development and improve polymer identification in complex matrices. Common plastic polymers including polyethylene, polypropylene, polystyrene, polyvinyl chloride, polyamide, poly(methyl methacrylate), styrene-butadiene rubber, and polyethylene terephthalate are accurately identified within a total analysis time of 45 min. A strategy to enhance compatibility of high-resolution capillary gas chromatography using a 150-µm internal diameter column technology and a larger internal volume microfurnace-based pyrolyzer is discussed. This strategy resulted in minimizing the band broadening effect caused by the pyrolyzer's internal volume and overcoming the slow pressure buildup when the sample is inserted into the furnace. Prolonged pressure buildup to reach a final pressure setting can cause a safety shutdown to the pneumatic control system. The developed approach is complementary to spectroscopic techniques by offering mass based, chemical composition analysis of plastics.
介绍了一种采用热解结合全二维气相色谱-火焰离子化检测的方法来鉴定常见的分离塑料聚合物。使用四极杆质谱仪作为并行检测器，以辅助方法开发并改善复杂基质中聚合物的鉴定。在45分钟的总分析时间内，能够准确鉴定包括聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、聚酰胺、聚甲基丙烯酸甲酯、丁苯橡胶和聚对苯二甲酸乙二酯在内的常见塑料聚合物。讨论了一种使用内径150μm的柱技术和更大内部体积的基于微炉的热解器来增强高分辨率毛细管气相色谱兼容性的策略。该策略可将热解器内部体积引起的谱带展宽效应降至最低，并克服样品插入炉中时压力建立缓慢的问题。长时间建立压力以达到最终压力设定可能会导致气动控制系统安全关闭。所开发的方法通过提供基于质量的塑料化学成分分析，对光谱技术起到补充作用。
