Abstract：In Walpole buffer solution,Ag(I) respectively reacted with indigo carmine,carmine and azocarmine G to form stable complex particles,significantly enhancing the resonance scattering (RS) signal of the solution,with highest scattering peaks at 276 nm,283 nm and 282 nm. Under the optimum conditions,Ag(I) concentrations of indigo carmine,carmine and azocarmine G systems in the range of 0.011-1.08 μg/mL,0.054-1.62 μg/mL,0.054-1.62 μg/mL achieved a good linear relationship with resonance scattering intensity ΔI,respectively,with the detection limits (DL) of 10.0 ng/L,14.0 ng/L and 9.51 ng/L,respectively. As the azocarmine G-Ag(I) system was more sensitive and had better calibration curve linearity,so azocarmine G was selected for the determination of trace silver in waste film. Silver in 3 samples with different silver contents was determined,giving the relative standard deviation (RSD) of 3.8 %,2.6 % and 1.3% and the recoveries of 102.4 %,98.8 % and 102.8 %,respectively.
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