Meaning
High resolution liquid chromatography coupled with tandem mass spectrometry identifies and quantifies trace chemical species extracted from polymer matrices. Execution of lc ms ms analysis isolates non-volatile additives, degradation products, oligomers and non-intentionally added substances down to parts-per-billion levels. The technique stops providing accurate quantitation when analyte ionization is suppressed by co-eluting matrix components or when compounds exceed mass spectrometer calibration ranges.
Material datasheets present nominal formulation targets, whereas mass spectrometry profiles actual chemical migrants released into food simulants or medical solutions. Regulatory filings for medical devices depend on these sensitive spectra to verify toxicological safety.
Mass Separation
Liquid mobile phases transport extracted compounds through chromatographic columns, separating molecules by chemical polarity. Effluent enters atmospheric pressure ionization sources, generating gas phase ions that pass into tandem mass analyzers. Multiple reaction monitoring selects specific precursor and product ion pairs for definitive compound identification.
Compound Quantitation
Calibration curves built from isotopically labeled internal standards yield precise concentration measurements for target additives. Matrix matched standards eliminate ion suppression effects caused by residual resin components during electrospray ionization.
Contaminant Detection
Trace degradation products formed during thermal processing appear as distinct chromatographic peaks during regulatory screening. Chemical structure elucidation identifies unknown contaminants to trace raw material impurities or tool lubricant leaching.
