Surface decontamination efficacy determination of DeconGel™ 1101 on stainless steel, carbon steel, and concrete surfaces contaminated with nickel nitrate (Ni(N03)2) was performed with ICP-OES (Inductively Coupled Plasma-Optical Emission Spectroscopy) according to Environmental Protection Agency (EPA) SW-846 Methods: 3005A (sampling) and 6010C (analysis).
Hazardous Materials Relevance
Nickel is corrosion-resistant and is used in alloys and platings, and in the manufacturing of rechargeable batteries, magnets, and coins .Nickel and its compounds can cause contact allergy and are believed to be carcinogenic. Nickel nitrate was chosen as a representative nickel compound for evaluating DeconGel's efficacy; DeconGel is expected to have similar efficacy towards the wide range of nickel compounds.
- Excellent surface decontamination was achieved by applying DeconGel 1101 onto surfaces contaminated with nickel compounds facilitating encapsulation/emulsification of contaminants by DeconGel's active components. Decontamination efficacies of DeconGel 1101 ranged from 98.3% (on concrete) to 99.3% (on carbon steel) to 99.9% (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 inorganic compounds in aqueous samples. When necessary, experimental methods were customized to facilitate complete dissolution of inorganic contaminants, and to ensure accurate decontamination efficacy determination of DeconGel.
Table 1 shows the decontamination efficacies of DeconGel 1101 on stainless steel, carbon steel, and concrete surfaces contaminated with nickel nitrate as determined by residual swipe testing.