A GC-MS Database of Nitrogen-Rich Volatile Compounds.

Area of Science:

• Environmental Chemistry
• Analytical Chemistry
• Organic Chemistry

Background:

• Unsymmetrical dimethylhydrazine (UDMH) is a rocket propellant with significant environmental release potential.
• UDMH degrades into numerous toxic and persistent transformation products.
• Existing gas chromatography-mass spectrometry (GC-MS) databases lack comprehensive data on these specific nitrogen-rich compounds.

Purpose of the Study:

• To address the limitations in identifying UDMH transformation products.
• To create a specialized database for these challenging compounds.
• To enhance environmental monitoring and risk assessment related to UDMH.

Main Methods:

• Development of a database containing 104 nitrogen-containing compounds, including UDMH transformation products.
• Inclusion of retention indices for non-polar and polar stationary GC phases.
• Inclusion of electron ionization mass spectra (70 eV) for each compound.

Main Results:

• A comprehensive database of UDMH transformation products and related nitrogen-containing heterocycles was compiled.
• The database provides crucial spectral and chromatographic data for identification via GC-MS.
• The database includes derivatives of triazoles, pyrazoles, imidazoles, pyridines, diazines, and triazines.

Conclusions:

• The new database significantly improves the ability to identify UDMH transformation products in environmental samples.
• This resource is valuable for researchers and environmental agencies monitoring UDMH contamination.
• The database is freely available online, facilitating wider scientific use and promoting environmental safety.