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摘要
A simple and selective HPLC method for the determination of coronene in hydrocracked vacuum gas oils is described. The method is based on normal-phase HPLC separation on a column packed with 3,5-dinitrobenzamidopropyl (DNBAP)-silica gel and on-line detection of the eluate with a diode-array detector. The diluted oil samples were injected directly on to the DNBAP column with a mixture of light petroleum (b.p. 60-90 degrees C) and o-xylene as eluent. The absolute detection limit was 7.9 ng when using UV detection at 305 nm, corresponding to a concentration detection limit of 4.0 mu g/g in the original oil samples, if a 20-mu l diluted sample with an oil concentration of 0.1 g/ml is injected. The relative standard deviation for ten replicate determinations was 2.8% at a coronene concentration of 7.02 mu g/ml.
- 出版日期1996-2-16
- 单位北京大学
