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  5. Microplastic Analysis and Additive Screening using Thermal Desorption/ Pyrolysis (TDP) DART-MS
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GCHPLCLiquid measurementMass spectrometryMetAmino KitSPE & MSPE

Microplastic Analysis and Additive Screening using Thermal Desorption/ Pyrolysis (TDP) DART-MS

Microplastics are more often appearing as contaminants in important water sources including our oceans and drinking supply. These small particles are not a single type of contaminant but a wide variety consisting of flame retardants, plastic stabilizers, and colorants. The presented TDP-DART-HRMS method requires no sample preparation and allowed for the rapid and direct screening of plastics of known and unknown sources without the need of any chromatographic separation. Three types of plastics were evaluated: polyethylene terephthalate (PET), polypropylene (PP), and low-density polyethylene (LDPE) from various sources. Additionally, an unknown plastic was analyzed. The unique combination of thermal desorption, direct ionization, high-resolution mass spectrometry and sophisticated postprocessing software for statistics and compound identification resulted in a improved detection and characterization of these concerning contaminants. The resulting high-resolution MS and MS/MS data was quickly processed and used to match against existing libraries with successful identification of the components that were present in the unknown sample.