Comparative Study on the Determination of Petroleum in Seawater by Fluorescence and Ultraviolet Methods
In this paper,the fluorescence spectrophotometric method and the ultraviolet spectrophotometric method of standard GB 17378.4-2007 were used for the determination of petroleum products in seawater,and the key indexes of the two methods,such as standard curve,method detection limit,precision and accuracy,were compared and studied respectively.The results showed that the correlation coefficients of the standard curves of the fluorescence method were 0.9996,0.9998,0.9999,and the correlation coefficients of the standard curves of the UV method were 0.9996,0.9999,and 0.9997,which were all greater than 0.999.The limit of detection of the fluorescence method was 0.0004 mg/L,which was significantly lower than that of the UV method was 0.0030 mg/L.The precision of the fluorescence method for the spiking of blank water samples,seawater and its seawater spiking was 0.20%～2.74%,which was better than that of the UV method with the precision of 0.13%～4.09%;the recoveries of the spiking of the samples of the fluorescence method were 95.1%～102.1%,which was better than that of the UV method was 87.0%～96.1%.In conclusion,the standard curves,method detection limits,precision and accuracy of the two methods meet the requirements of standard test and can be used for the determination of petroleums in seawater,but the fluorescence method is more sensitive,the experimental data are more stable,and it is more suitable for the determination of seawater samples with lower concentrations of petroleums.
万方数据
维普
