热裂解-气质联用仪(PY-GC/MS)在微塑料分析中的应用

Application of Pyrolysis Gas Chromatography-Mass Spectrometry(PY-GC/MS)in Analysis of Microplastics

塑料是一种合成材料,因其成本低廉、耐用、重量轻、易于制造等众多优点,使得这些聚合物在日常生活中无处不在。近年来,科学家、环保部门和公众越来越关注塑料污染,特别是微/纳米塑料。通常,研究各类样品中的微塑料都需要从样品中将微塑料颗粒分离出来,然后用光谱方法来识别分析。光谱技术可进行微塑料的定性分析,但无法获取其准确的质量,而这些对毒理学评估很重要。为了同时实现样品中微塑料的定性和定量分析,许多研究人员开始进行热裂解-气相色谱/质谱法(PY-GC/MS)在微塑料分析中的应用。综述了近5年PY-GC/MS在微塑料研究中的应用,包括PY-GC/MS技术简介、样品采集、样品前处理、仪器分析方法建立以及问题与展望。

Plastics are synthetic materials whose advantages such as low cost,durability,light weight,and ease of manufacture have made these polymers ubiquitous in daily life.In recent years,scientists,environmental protection departments and the public have become increasingly concerned about plastic pollution,especially micro/nano plastics.Usually,studying microplastics in various samples requires separating microplastic particles from the samples and then using spectroscopic methods to identify and analyze them.Spectroscopic techniques allow for qualitative analysis of microplastics but do not provide access to their accurate masses,which are important for toxicological assessments.In order to simultaneously achieve qualitative and quantitative analysis of microplastics in samples,many researchers have begun to apply thermal pyrolysis-gas chromatography/mass spectrometry(PY-GC/MS)in the analysis of microplastics.In this article,application of PY-GC/MS in the study of microplastics in the past five years was reviewed,including an introduction to PY-GC/MS technology,sample collection,sample preprocessing,establishment of instrumental analysis methods,and problems and prospects.