By Robert D Morrison; Brian Murphy
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Extra info for Chlorinated solvents
Tests that are more specific for stabilizers, including the AAV, include the Kauri Gum Index (Kb) test, partitioning experiments, vapor degreaser experiments, the aluminium scratch test, stabilizer synergy testing and accelerated oxidation testing. 1 Acid Acceptance Value (AAV) AAV tests determine whether acid in a solvent is sufficiently stabilized with acid acceptor inhibitors. Standard tests include ASTM D-2942, which measures the total acceptance value by measuring the total concentration of amine and neutral-type (alpha epoxides inhibitors) in a solvent, ASTM D-2106 which measures the amine acid acceptance via the concentration of an amine (basic) inhibitor using standard acid titration and ASTM D-2942 which measures AAV via the total concentration of the amine and neutral-type (alpha epoxides) inhibitors in a solvent.
Fresh solvent was added to maintain a constant volume. Actual degreasing operations were simulated, including the presence of a warm dip tank and the addition of metals (100 grams each of 2024 aluminum turnings and a 70/30 mixture of brass turnings and coarse steel wool). A lubricating oil was also added to the boil sump that consisted of about 10% of the liquid volume of the boil sump; on the 18th test day, water equivalent to about 1% of the total degreaser volume was added. The boiling sump and warm dip tank were sampled every other day and inhibitor distributor profiles obtained.
McCarty and M. Reinhard, Biological and chemical transformations of halogenated aliphatic compounds in aquatic and terrestrial environments, in The Biogeochemistry of Global Change: Radiative Trace Gases, ed. R. S. Oremland, Chapman & Hall, New York, NY, 1993, p. 839. 55. L. Semprini, G. D. Hopkins, P. L. McCarty and P. V. Roberts, Environ. Sci. , 1992, 26, 2455. 56. L. Semprini, G. Hopkins, P. McCarty and P. Roberts, Environ. Sci. , 1992, 26, 2454. 57. J. A. Field and R. Sierra-Alvarez, Biodegradability of chlorinated solvents and related chlorinated aliphatic compounds, Science Dossier Series 8, Euro Chlor, Brussels, Belgium, 2004, p.