Liner Activity and Deactivation

The finer activity is usually measured and compared by using injections of endrin and dichloro-diphenyl-trichloroethane (DDT). The breakdown products are endrin ketone and endrin aldehyde, respectively dichloro-diphenyl-dichloroethane (DDD). With breakdown percentages less than 15% each, an insert liner is accepted to be inert (e.g. EPA method 8081b). 

1) Dilute the SurfaSil siliconizing fluid in a non-polar organic solvent such as acetone, toluene, carbon tetrachloride, methylene chloride, chloroform, xylene or hexane. Typical working concentrations are 1-10% mass to volume. 

Completely immerse or flood the dry inlet liner to be coated in the diluted SurfaSU solution for at least 5-10 s. Agitate the solution to ensure a uniform coat. A thin film will immediately coat the liner s surface. 

Rinse the liner with the same solvent in which the reagent was diluted. 

Rinse the liner with methanol. This rinse is required to prevent interaction of the SurfaSil coating with water and thus, reversing sihconization. 

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