Abstract：Polyvinylpyrrolidone nano silver was synthesized, and the fluorescence enhancement of polyvinylpyrrolidone nano silver-polyethylene glycol-mercury system was investigated. The result indicated that the fluorescence emission intensity of polyvinylpyrrolidone nano silver-polyethylene glycol-mercury system at 369 nm increased gradually when micro mercury was added into polyvinylpyrrolidone nano silver solution with polyethylene glycol. The linear relationship equation between the increasing amount of fluorescence emission intensity and the concentration of mercury was ΔF=3.206×106c-7.083 with R=0.996 4, linear range of 4.0×10-6-3.6×10-5 mol/L and detection limit of 3.0×10-10 mol/L. Meanwhile, the interaction mechanism was proposed between polyvinylpyrrolidone nano silver-polyethylene glycol system and mercury by combining with ultraviolet and visible spectrometry.
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