We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Into the Multiverse: Analysis of microplastic leachates using comprehensive multi-dimensional gas chromatography-mass spectrometry
AI summary Read the abstract
Researchers used comprehensive multidimensional gas chromatography to analyze the complex mixture of chemical compounds leaching from microplastics in marine environments, addressing the challenge that hundreds of leachable chemicals make full characterization difficult. The multiverse analytical approach substantially expanded the number of identified leachable chemicals, revealing the chemical complexity of microplastic contamination in seawater.
Plastic and microplastics in the marine environment can leach chemical compounds. Many such chemicals may incite toxicity in exposed organisms. The identification and assessment of plastic-associated chemicals released into the marine environment is a growing area of research. However, a large number of chemical compounds in microplastic leachates remain unidentified, meaning a suite of toxic compounds may be overlooked. Herein, we present the development of a novel method for the analysis of marine microplastic leachate using comprehensive two-dimensional gas chromatography-mass spectrometry (GCxGC-MS). The use of multi-dimensional chromatography provides greater separation capacity over traditional one-dimensional techniques, therefore aiding in the identification of multiple, and potentially previously unidentified, compounds within complex leachate samples. To our knowledge, this is the first use of this technique for the analysis of microplastic leaching under marine conditions. Method development was performed using virgin samples of conventional polymers (low-density polyethylene (LDPE), polypropylene (PP), polyethylene terephthalate (PET) and polyvinyl chloride (PVC)) and bio-polymers (polylactic acid (PLA), polybutylene succinate (PBS), poly(butylene adipate-co-terephthalate) (PBAT), poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV)). First, organic extracts were analysed by one-dimensional gas chromatography-mass spectrometry (GC-MS) and subsequently by GCxGC-MS. The organic extract analysis enabled a comprehensive determination of chemical composition in samples and optimisation of the chromatographic parameters. Next, leachates were prepared in simulated marine conditions, for example in filtered seawater at ambient temperatures. Different pre-concentration methods were trialled including solid-phase extraction of aqueous leachate samples as well as online headspace solid phase micro-extraction and direct immersion. The method affords the identification of chemicals of potential concern associated with microplastics in the environment, which can be used to inform ecotoxicological studies and environmental monitoring. Also see: https://micro2024.sciencesconf.org/559469/document
More Papers Like This
Into the Multiverse: Analysis of microplastic leachates using comprehensive multi-dimensional gas chromatography-mass spectrometry
AI summary Read the abstract
Researchers applied comprehensive multidimensional chromatography to identify the full range of chemical leachates released by plastics and microplastics in marine environments. The multi-technique approach revealed a far larger diversity of leaching compounds than targeted analyses alone would detect.
Non-targeted analysis for organic components of microplastic leachates
AI summary Read the abstract
Researchers used non-targeted analysis to identify over 100 organic compounds leaching from five common plastic polymer types in simulated gastric fluid, freshwater, and seawater, finding that leaching medium significantly influenced the chemical profile and that recycled plastics leached distinct compound clusters compared to virgin materials.
Simultaneous Trace Identification and Quantification of Common Types of Microplastics in Environmental Samples by Pyrolysis-Gas Chromatography–Mass Spectrometry
AI summary Read the abstract
Researchers developed a method for simultaneous trace identification and quantification of common microplastic types in environmental samples, improving detection efficiency and enabling more accurate monitoring of multiple plastic polymers at once.
Towards the comprehensive wide-scope analysis of legacy and emerging contaminants sorbed in microplastics
AI summary Read the abstract
Microplastics don't just pose a direct physical hazard—they also act as sponges, absorbing toxic chemicals from the surrounding environment and potentially delivering concentrated doses to organisms that ingest them. This study developed and validated two analytical methods (using liquid chromatography and gas chromatography-mass spectrometry) capable of detecting up to 254 different legacy and emerging contaminants in plastic particles at concentrations as low as 0.1 nanograms per gram. The validated methods achieved over 92% accuracy across three plastic polymer types, providing a practical toolkit for researchers monitoring the chemical cocktails hitchhiking on environmental microplastics. Standardizing how these contaminants are measured is essential for understanding the true health and ecological risks of plastic pollution.
Simultaneous determination of persistent and emerging organic pollutants in microplastics
AI summary Read the abstract
Researchers developed and validated a new analytical method to simultaneously detect 45 persistent and emerging organic pollutants sorbed onto microplastics. The method was tested on several polymer types including polypropylene and polyethylene, both pristine and weathered, using solvent extraction and gas chromatography-mass spectrometry. The study provides a practical tool for assessing the chemical contamination that microplastics can carry and transport through the environment.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.