Authors proposed a procedure for the rapid determination of Dowtherm A (Therm-S-300), Neo-SK-Oil #260 and KSK-Oil 260 in deodorizer distillate. Much quanties of interfering matters in deodorizer disstillate are removed by silicagel column chromatograpy followed by analysis of the heat transfer mediums through gas liquid chromatography.
Each analysis takes about 2 hours.
The lower detection limit is 100 ppm for Dowtherm A and 250 ppm for Neo-SK-Oil #260 and KSK-Oil 260 respectively, enabling easy identification.
