Surface decontamination efficacy determination of DeconGelTM 1101 on stainless steel, aluminum, and concrete surfaces contaminated with Industrial Coolants (ethylene glycol (EG)) was performed with GC/MS (Gas Chromatography/Mass Spectrometry) in accordance with Environmental Protection Agency (EPA) SW-846 Methods: 3500C (sampling) and 8270C (analysis).
Hazardous Materials Relevance
Ethylene glycol is a viscous odorless liquid used widely as a coolant/heat transfer agent. EG is also used as a dessicant, and as a polymer precursor, and is moderately orally toxic to humans. Ingestion of large amounts of EG can be fatal if untreated. EG was chosen as a representative industrial coolant; DeconGel is expected to have similar efficacy towards the wide range of industrial coolants.
- Excellent surface decontamination was achieved by applying DeconGel 1101 onto surfaces contaminated with industrial coolants (EG) resulting in encapsulation of contaminants by DeconGel’s active components. Decontamination efficacies of DeconGel 1101 ranged from 93.6% (on concrete) to 95.5% (on stainless steel) to 95.5% (on aluminum) for EG determined by residual swipe analysis.
- Optimized experimental and analytical methods were successfully developed following standardized EPA sampling and analysis methods as guidelines for determination of organic compounds dissolved in a suitable solvent able to completely solvate aniline as well as DeconGel components. When necessary, experimental methods were customized to afford complete dissolution of organic contaminants. Additionally, analytical methods and associated equipment (GC column, GC temperature gradient program, MS sample ionization parameters) were appropriately utilized to ensure accurate decontamination efficacy determination of DeconGel.
Table 1 shows the decontamination efficacies of DeconGel 1101 on stainless steel, aluminum, and concrete surfaces contaminated with Industrial Coolants (EG) as determined by residual swipe testing