Why are septum vials preferred for TTO samples?

Septum vials are preferred for TTO (Total Toxic Organic) samples primarily because they prevent sample contact with air. This is crucial in maintaining the integrity and stability of the sample during storage and analysis. Exposure to air can lead to evaporation, oxidation, or degradation of certain compounds, which would compromise the results of the analysis. The design of septum vials allows for the insertion of syringes through a self-sealing rubber or silicone septum, maintaining a closed system that minimizes the risk of contaminants entering the vial while also protecting the sample from atmospheric impacts.

Maintaining the sample's condition is critical in ensuring that the analytical results reflect the true characteristics of the sample collected, providing accurate data for assessments and compliance with environmental regulations.