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A second derivative polarographic wave of naphthalene is observed in 50% N, N- dimethylformamide and ammonia-ammonium chloride medium. The peak potential is about - 1. 05 V (vs. SCE). The concentration of naphthalene is linear with peak current in the range of 5. 00 X 10~-6 mol/L to 5. 00 X 10~-4 mol/L, The detection limit is 2. 00X 10~-6mol/L. This method can be used to determine naphthalene content of the sample such as coal,mothball and asphaltic bitumen. The relative standard deviation (RSD) are in the range of 0. 38% ~1. 30%. The determined recoveries by adding known amounts of naphthalene to sample solution are in the range of 92% - 101 %. This paper also study on the polarographic behavior of naphthalene.
A second derivative polarographic wave of naphthalene is observed in 50% N, N-dimethylformamide and ammonia-ammonium chloride medium. The peak concentration is about - 1.05 V (vs. SCE). The concentration of naphthalene is linear with peak current in The range of 5. 00 X 10 ~ -6 mol / L to 5. 00 X 10 ~ -4 mol / L, the detection limit is 2. 00X 10 ~ -6mol / L. This method can be used to determine naphthalene content of the sample such as coal, mothball and asphaltic bitumen. The relative standard deviation (RSD) are in the range of 0. 38% -1.30%. The determined recoveries by adding known amounts of naphthalene to sample solution are in the range of 92% - 101%. This paper also study on the polarographic behavior of naphthalene.