Surface decontamination efficacy determination of DeconGel™ 1101 and 1102 on stainless steel, aluminum, and concrete surfaces contaminated with Hydrocarbon Petroleum Distillates (kerosene) was performed with GC/MS (Gas Chromatography/Mass Spectrometry) according to Environmental Protection Agency (EPA) SW-846 Methods: 3500C (sampling) and 8270C (analysis).
Hazardous Materials Relevance
Kerosene is a highly flammable, volatile hydrocarbon liquid petroleum distillate mixture containing between six to sixteen carbon atom molecules. Kerosene is used as a heating fuel, propellant, and solvent and thinner. Ingestion of kerosene is harmful and in sufficient quantities can be fatal. Kerosene was chosen as a representative petroleum distillate; DeconGel is expected to have similar efficacy towards the wide range of hydrocarbon petroleum distillates.
- Excellent surface decontamination was achieved by applying both DeconGel 1101 and 1102, both via brushing or pouring (non-brushed) onto contaminated surfaces, resulting in encapsulation of kerosene by DeconGel's active components. Decontamination efficacies of poured DeconGel 1101 ranged from 92.8% (on concrete) to 95.8% (on stainless steel) to 96.0% (on aluminum), brushed DeconGel 1101 ranged from 100% (on concrete) to 99.8% (on stainless steel) to 99.8% (on aluminum), as determined by residual swipe analysis. Decontamination efficacies of poured DeconGel 1102 ranged from 100% (on concrete) to 100% (on aluminum) to 100% (on stainless steel), brushed DeconGel 1102 ranged from 100% (on concrete) to 100% (on aluminum) to 100% (on stainless steel), as 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 kerosene 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.
Tables 1 shows the decontamination efficacies of DeconGel 1101 and 1102 on stainless steel, aluminum, and concrete surfaces contaminated with Hydrocarbon Petroleum Distillates (kerosene) as determined by residual swipe testing.