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Determination of Naphthalene by Single Sweep Polarography

Zhang Li-hu

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Abstract

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.

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What this paper is about

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.

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Available abstract

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.

Key concepts: Naphthalene, Polarography, Chemistry, Detection limit, Analytical Chemistry (journal), Ammonia, Dimethylformamide, Relative standard deviation

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