Spectrophotometric determination of iron(II) with 5-nitro-6-amino-1,10-phenanthroline

Demirhan N., ELMALI F.

TURKISH JOURNAL OF CHEMISTRY, vol.27, no.3, pp.315-321, 2003 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 27 Issue: 3
  • Publication Date: 2003
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Page Numbers: pp.315-321
  • Keywords: 5-nitro-6-amino-1,10-phenanthroline, visible spectrophotometry, determination of iron(II)
  • Yıldız Technical University Affiliated: Yes


A new spectrophotometric method is developed for the determination of Fe(II) with 5-nitro-6-amino-1,10-phenanthroline (NAF). In this work, the effect of factors such as pH, amount of reagent (NAF), reaction time and temperature were investigated. The method is based on the formation of a colored product between Fe(II) and NAF. The reaction proceed quantitatively at 20 degreesC for 210 min in acidic medium. The absorption maximum was at 520 nm. A linear relationship existed between absorbance and Fe(II) concentration over the range 0.1 mug/mL and 0.4 mug/mL. The molar ratio of Fe(II) to the reagent was determined as 1:3. The limiting concentration for interference by Co(II), Ni(II), Cu(II), Zn(II), Mn(II), Al(III), Ca(II) and Mg(II) cations are reported.