Electron Ionization

Analytical Performance

This spectral output provides the necessary data for mass spectrometry to match observed patterns against known spectral databases. Laboratory technicians rely on these fragmented fingerprints to distinguish between common finishing agents like nonionic surfactants or polyethylene glycols. Precise vacuum conditions inside the instrument ensure that neutral molecules do not interfere with the collision trajectory, which maintains the resolution of the mass fragments for accurate library searching.

Sample Processing

Volatility requirements dictate that the target substance must enter the gaseous state before it enters the electron beam path. Heat from the inlet or the furnace allows heavier molecules to sublimate or vaporize without suffering thermal decomposition before the ionization event occurs. High molecular weight polymers often require pyrolysis to break long chains into smaller detectable units before the gas reaches the ionization chamber.

Operational Sensitivity

Certain compounds exhibit high stability under bombardment, resulting in a strong signal for the original molecular ion while others shatter into base fragments almost instantly. Differences in bond strength across various functional groups determine the ratio of heavy mass peaks to lighter ions detected at the end of the analysis. The intensity of specific fragments provides a quantitative basis for identifying impurities in a textile batch down to trace levels.