Petr Vozka: Counting Double Bonds: GC×GC–FID for Plastic Pyrolysis Oils (MDCW 2026)

Описание: 🎤 Presenter: Petr Vozka (California State University LA)
💾 PDF presentation: https://gcms.labrulez.com/labrulez-bu...

Abstract

Microplastics (MPs) are pervasive pollutants throughout our local marine environments. They serve as vectors for organic compounds, yet the variability of their adsorbed contaminants along highly urbanized coastlines remains poorly resolved.

This study examines the variation in MP contamination and its associated organic compounds across three beach sites in the greater Los Angeles region. Surface sediments will be collected from each site. MPs will be isolated through a density separation to remove inorganic components, followed by oxidative digestion of the remaining organic matter. The recovered MPs will be characterized using an inlet capable of high-temperature thermal desorption/pyrolysis coupled with two-dimensional gas chromatography-time-of-flight mass spectrometry (GCxGC-TOFMS) to identify polymer-specific marker compounds and thereby determine MP composition and relative abundance at each location. In addition, a preliminary thermal desorption (TD) step will be applied before pyrolysis to assess organic compounds adsorbed to MP surfaces. Chromatographic profiles from the single-step TD/PY-GC×GC-TOF-MS analyses will be statistically compared among sites using Chromatof Sync 2D software to evaluate differences in both polymer types and co-occurring contaminants. The results will provide insight into how local sources, hydrodynamics, and land use patterns influence the distribution of MP polymers and their adsorbed contaminant loads along urbanized Southern California coastlines.

💡 The Multidimensional Chromatography Workshop (MDCW) Profile LabRulezGCMS (EN):
👉 https://gcms.labrulez.com/companies/218

💡 The Multidimensional Chromatography Workshop (MDCW) Profile LabRulezLCMS (EN):
👉 https://lcms.labrulez.com/companies/218