The sensitization effect of sodium dodecyl benzene sulfonate(SDBS) on the fluorescence of pyrene and anthracene was observed obviously,and the magnitude of increase in fluorescence intensity was found to keep linear relationships with the concentration of pyrene in the range of 4.9×10-9-5.0×10-8mol·L-1 and anthracene in the range of 5.6×10-9-5.6×10-8mol·L-1.Values of detection limit(3S/N) found were 7.4×10-10mol·L-1 for pyrene and 3.7×10-10mol·L-1 for anthracene.The reaction was used for determination of pyrene and anthracene and was applied to the analysis of river water,tap water and lake water,giving values of recovery in the range of 91.0%-102.0%(for pyrene) and 90.0%-111.1%(for anthracene).

Fluorescence method was applied to the determination of anthracene and pyrene.The calibration curve linear ranges of anthracene and pyrene were 5.6×10-9—2.8×10-6mol/L and 4.9×10-8—1.47×10-6mol/L,respectively.Correlative coefficient was obtained as 0.99959 and 0.99822.The effect of common ion,temperature and time on the fluorescence intensity were studied.The no interference of common ions were for determination.Under the experiments conditions of 2 hours,5—55℃,the intensity of fluorescence was stable.Therefore this method has a wide range for temperature.can be used to detect anthracene and pyrene straight in non water system such as food,drink and liquor.

A direct spectrofluorimetry method was established for simultaneous determination of dissolved pyrene(Py) and fluoranthene(FLuA) in water based on the great enhancement of fluorescence intensities of Py and FLuA in tween-20(Tw-20) medium.The effects of the types of surfactants,pH,and temperature on the systems were investigated.Under the optimized conditions,the calibration curves showed a good linear range from 1.98×10-10 to 9.88×10-8 mol/L for Py and 2.00×10-9 to 7.99×10-7 mol/L for FLuA,and their detection limits were 9.88×10-11 mol/L and 5.99×10-10 mol/L,respectively.The method was applied in the determination of Py and FLuA in real samples with satisfactory results.The recoveries of pyrene in tap water and river water were 92%-102% and 101%-102%,and the recoveries of fluoranthene in tap water and river water were 90%-100% and 94%-111%,respectively.The method is simple,rapid and sensitive for the determination of trace Py and FLuA in the real water sample.

As PAHs has a high Photoluminescent(PL) quantum yield and the solubilization and sensibilization effect of Nonionic surfactants on PAHs,a spectrofluorimetry has been established for Tween-80(TW-80) micellar sensitization of dissolved Anthracene(ANT) in water.The linear ranges for the determination of dissolved Anthracene was 1.6833×10-8～1.29×10-6 mol/L,the detection limits was 1.07×10-8mol/L.The method was highly sensitive.By using this method,real samples(tap water,river-water,lake-water) were determined directly and good results were obtained.The recovery of river-water was 94.6%～109.5%,the recovery of lake-water was 90.5%～106.9%,and the recovery of tap-water was 86.9%～111.7%.The method is rapid,sensitive,and simple to forecast and manage the pollution of water.