There is growing interest in quantifying microplastics in environmental samples.
This application note presents a robust pressurized liquid extraction (PLE) with
pyrolysis-gas chromatography-mass spectrometry (pyr-GC/MS) method for
quantitation of microplastics like polyethylene (PE), polypropylene (PP), and
polystyrene (PS) at low concentrations in environmental matrices using the Agilent
5977B GC/MSD, Agilent 7890B GC, and Agilent MassHunter workstation software.
Linearity, limits of quantitation (LOQs), and reproducibility for real environmental
samples were evaluated. The GC/MSD addressed the insufficient limits of detection
that have challenged previous methods. PE, PP, and PS microplastics were
quantified down to 0.005 mg/g. Excellent linearity (R2
>0.97) for calibration samples
from 0.005 to 1 mg/g was obtained. Relative standard deviations (RSDs) for both
spiked and environmental samples were <10% or lower, demonstrating excellent
system reproducibility and reliability.
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