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Neotetrazolium chloride: a new reagent for spectrophotometric determination of manganese

Authors
Journal
Talanta
0039-9140
Publisher
Elsevier
Publication Date
Volume
46
Issue
5
Identifiers
DOI: 10.1016/s0039-9140(97)00376-7
Keywords
  • Extraction-Spectrophotometry
  • Manganese Determination
  • Soils
  • Steels

Abstract

Abstract The interaction of Mn(VII) and the Neotetrazolium chloride has been examined. The ion-associate formed is extracted into 1,2di-chloroethane. The optimum conditions have been established. The molar absorptivity of the complex is (9.1±0.08)×10 5 l mol −1 cm −1. The sensitivity of the method is 6.04×1010 −5 μg cm −2. It is possible to extract and determine manganese in the presence of large number of cations and anions. The characteristic values for the extraction and the aqueous phase equilibria were determined: extraction constant K ex=3.21×10 9, distribution constant K D=33 and association constant β=9.72×10 7. The method is applicable to analysis of soils and steels.

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