DOWPER®, tetrachloroethylene

Generally, 1 to 5 mg of sample dissolved in 100 pi of mobile phase were injected for each SEC run. For the Si-H determinations tetrachloroethylene (TCE) mobile phase was used at 55°C. It was Dowper grade (Dow Chemical Co.) and was dried by passage through activated Molecular Sieves (Linde Co.). The Si-OH analyses employed 1,4-dioxane/ TCE (90/10 by volume) at the same temperature. The dioxane was purchased from Burdick Jackson, with UV cutoff of 211 nm and water content of 0.036%. The silicone-phenyl analyses used methylene chloride (Burdick Jackson, UV cutoff of 230 nm, water content 0.003%) at 35°C and tetrahydrofuran (THF, Burdick Jackson, UV cutoff 212 nm, water content 0.02% or less) at 50 C. Each of the mobile phases was continually purged with pure helium during use. 

Tetrachloroethylene DOWPER, Pertene, PERKLONE, SOLTENE NONE... 

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