Spectrophotometric Determination of Nitrite using Diphenylamine as Complexing Agent
Mahmoud Chamsaz*, Mohammad Hossein Arbab-Zavar and Jeyran Akhondzadeh

Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Iran
Fax: (98)(511)6085105; Tel: (98)(511)8795162 Ext. 333
E-mail: je_ak91@stu-mail.um.ac.ir

Abstract

A rapid, simple and sensitive method for determination of trace level of nitrite is described. Nitrite reacts with diphenylamine in sulfuric acid media with 1:2 stoichiometery and the blue coloured complex is determined at 588 nm. Beer's law is obeyed in the range of 38-1150 ng mL-1. Detection limit is 38 ng mL-1, analytical sensitivity is 6 ng mL-1 and relative standard deviation is 5 %. The effect of different ions in determination of nitrite was also investigated.

Keywords

Nitrite, Diphenylamine, Spectrophotometery.
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  • Asian J. Chem. /
  •  2009 /
  •  21(2) /
  •  pp 903-906