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 °C 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 \mu g/mL and 0.4 \mu g/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.
DEMİRHAN, NEBAHAT and ELMALI, FİKRİYE TUNCEL (2003) "Spectrophotometric Determination of Iron(II) with 5-Nitro-6-amino-1,10-phenanthroline," Turkish Journal of Chemistry: Vol. 27: No. 3, Article 5. Available at: https://journals.tubitak.gov.tr/chem/vol27/iss3/5