DETERMINATION OF TRACE AMOUNTS OF OIL-IN-WATER BY ADSORPTION FILTRATION .1. INFRARED METHOD

Silicon carbide was examined as an adsorbent on which oil can be easil y adsorbed and subsequently eluted. A method for the determination of trace amounts of oil in water was developed. A water sample was filter ed through a funnel containing silicon carbide and the adsorbed oil wa s then eluted and measured by infrared spectrometry or other methods. The amount of organic solvent used in this method was much less than t hat in an extraction method, the enrichment efficiency was greatly inc reased and the method is superior to liquid-liquid extraction. The met hod was applied to synthetic samples and effluent samples from an oil refinery and the experimental results were satisfactory. The detection limit in a water sample is 0.002 ppm, the recovery is more than 90%, the average error is 1.8% and the average deviation is 6.1%.