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Differential Pulse Polarographic Determination of Nitrate in AUT Solution
Author(s) -
Lee ChiSo
Publication year - 1987
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.198700031
Subject(s) - polarography , chemistry , nitrate , detection limit , nitrite , electrolyte , pulse (music) , analytical chemistry (journal) , supporting electrolyte , uranyl nitrate , aqueous solution , ion , potassium nitrate , inorganic chemistry , electrode , chromatography , potassium , uranium , materials science , electrical engineering , organic chemistry , detector , metallurgy , engineering
A differential pulse polarographic method for the determination of nitrate ion has been developed. With 0.5 M CaCl 2 as supporting electrolyte, NO − 3 is reduced to give a peak with E 1/2 =–1.836 Volt vs . the Ag/AgCl electrode. The differential pulse polarographic peak height is proportional to the nitrate concentration from 20 to 60 ppm . The detection limit for nitrate is 2 ppm in pure aqueous solution. In the determination of 40 ppm nitrate a relative precision (relative standard deviation) of less than 2% was achieved. Nitrite interferes seriously and should be absent if accurate results are required. The method has been applied to the determination of nitrate in Ammonium Uranyl Tricarbonate (AUT) Solution, results obtained by this method are compared to those obtained by ion chromatography. The agreement between the two sets of results suggests that the DPP method can be used with a fair degree of confidence.