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首页> 外文期刊>International Journal of Environmental Research and Public Health >Use of a Deuterated Internal Standard with Pyrolysis-GC/MS Dimeric Marker Analysis to Quantify Tire Tread Particles in the Environment
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Use of a Deuterated Internal Standard with Pyrolysis-GC/MS Dimeric Marker Analysis to Quantify Tire Tread Particles in the Environment

机译：使用氘代内标和热解-GC / MS二聚体标记分析来定量环境中的轮胎胎面颗粒

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摘要

Pyrolysis(pyr)-GC/MS analysis of characteristic thermal decomposition fragments has been previously used for qualitative fingerprinting of organic sources in environmental samples. A quantitative pyr-GC/MS method based on characteristic tire polymer pyrolysis products was developed for tread particle quantification in environmental matrices including soil, sediment, and air. The feasibility of quantitative pyr-GC/MS analysis of tread was confirmed in a method evaluation study using artificial soil spiked with known amounts of cryogenically generated tread. Tread concentration determined by blinded analyses was highly correlated (r2 3 0.88) with the known tread spike concentration. Two critical refinements to the initial pyrolysis protocol were identified including use of an internal standard and quantification by the dimeric markers vinylcyclohexene and dipentene, which have good specificity for rubber polymer with no other appreciable environmental sources. A novel use of deuterated internal standards of similar polymeric structure was developed to correct the variable analyte recovery caused by sample size, matrix effects, and ion source variability. The resultant quantitative pyr-GC/MS protocol is reliable and transferable between laboratories.
机译：特征热分解片段的热解（pyr）-GC / MS分析先前已用于环境样品中有机源的定性指纹分析。建立了基于特征轮胎聚合物热解产物的定量pyr-GC / MS方法，用于在土壤，沉积物和空气等环境基质中进行胎面颗粒定量。使用掺有已知数量的低温生成胎面的人造土壤进行的方法评估研究证实了对胎面进行定量pyr-GC / MS分析的可行性。通过盲法分析确定的胎面浓度与已知胎面钉浓度高度相关（r2 3 0.88）。确定了对初始热解方案的两个关键改进，包括使用内标和通过二聚体标记乙烯基环己烯和二戊烯进行定量，它们对橡胶聚合物具有良好的特异性，没有其他可观的环境来源。开发了一种使用类似聚合物结构的氘代内标的新方法，以纠正由于样品量，基质效应和离子源变异性而导致的可变分析物回收率。生成的定量pyr-GC / MS方案可靠，并且可以在实验室之间转移。

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