Meaning
High-resolution analytical instrumentation combining gas chromatography with time-of-flight mass spectrometry characterizes trace volatile contaminants in polymer resins. In recycled resin characterization, gc-ms tof identifies non-intentionally added substances by measuring ion mass-to-charge ratios at high spectral acquisition rates. The measurement boundary stops at non-volatile compounds that cannot evaporate without thermal degradation inside the injection port.
Ion Separation
Acceleration of ionized molecules through a field-free flight tube separates fragments based on mass velocity. Lighter ions reach the detector faster than heavier fragments, generating complete mass spectra in microseconds. Rapid spectral generation permits deconvoluting overlapping chromatographic peaks in complex post-consumer plastic extracts.
Fast data acquisition rates preserve spectral integrity across narrow chromatographic peaks produced by fast gas chromatography columns.
Mass Resolution
Exact mass accuracy enables determination of elemental formulas for unknown degradation products in recycled polyolefins. Utilizing gc-ms tof allows analytical chemists to distinguish target additives from harmful degradation impurities present at parts-per-billion levels. High resolution eliminates false positive matches against standard spectral reference libraries.
Contaminant Profiling
Volatile organic compounds originating from prior chemical contact impair the odor profile of recycled resin pellets. Detailed peak profiling pinpoints specific breakdown products from thermal processing. Identifying contaminant sources enables recyclers to optimize vacuum degassing parameters during compounding.
