Abstract
Complementary analytical procedures using capillary gas chromatography (GC) and high-performance liquid chromatography (HPLC) have been developed for the analysis of the TRUEX process solvents (CMPO-TBP-tetrachloroethylene or normal paraffinic hydrocarbons) and the extractant CMPO. GC analyses are accomplished in 20 min using a 15 m × 0.25 μm I.D. DB-5 capillary column with flame ionization detection. The analysis requires derivatization with diazomethane. HPLC analyses are performed in 10 min using a C 18 reversed-phase column and a mobile phase consisting of acetonitrile-water-triethylamine (79:29.5:0.5) with refractive index and ultraviolet detection. The methods provide information regarding the presence of acidic and neutral impurities in stock extractant, fresh process solvent, and recovered TRUEX solvent.
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