Meaning
Analytical equipment identifies chemical compounds by mass. Scientists use gas chromatography qtof to separate complex mixtures into individual molecules before measuring their exact mass. This specific tool combines the separation power of chromatography with the high resolution of a quadrupole time of flight detector.
It provides a way to detect contaminants at parts per billion levels.
Analytical Performance
High resolution data allows for the determination of elemental composition. The detector measures the time it takes for ions to travel through a flight tube. Mass accuracy within five parts per million is achievable through this method.
Molecular Characterisation
Fragments of molecules provide a fingerprint for structural identification. Software libraries compare these fragments against known standards to confirm the presence of specific polymer additives or degradation products. The technique identifies unknown substances without requiring a prior reference standard.
Reliable data supports the safety assessment of recycled resins.
Trace Identification
Detection of non-intentionally added substances depends on the sensitivity of the instrument. Small peaks in the chromatogram represent potential migrants from the plastic into food or medical fluids. Identifying these compounds is a requirement for meeting modern safety standards.
Quantitative analysis determines if the concentration of a substance falls within legal limits.
