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 easily adsorbed and subsequently eluted. A method for the determination of trace amounts of oil in water was developed. A water sample was filtered through a funnel containing silicon carbide and the adsorbed oil was then eluted and measured by infrared spectrometry or other methods. The amount of organic solvent used in this method was much less than that in an extraction method, the enrichment efficiency was greatly increased and the method is superior to liquid-liquid extraction. The method 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%.