A very sensitive flow-injection spectrophotometric determination method for iron (II) and total iron using 2 ', 3, 4 ', 5, 7-pentahydroxyflavone

Asan A., Aydin R., Semiz D. K., Erci V., IŞILDAK İ.

ENVIRONMENTAL MONITORING AND ASSESSMENT, vol.185, no.3, pp.2115-2121, 2013 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 185 Issue: 3
  • Publication Date: 2013
  • Doi Number: 10.1007/s10661-012-2693-y
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.2115-2121
  • Keywords: Flow-injection analysis, Iron, Spectrophotometry, 2 ', 3, 4 ', 5, 7-Pentahydroxyflavone, WATER SAMPLES, IRON(III), ACID, FE(III), PRECONCENTRATION, SPECIATION, FERROZINE, SEAWATER, RESIN
  • Yıldız Technical University Affiliated: Yes


In this study, an ultra-sensitive and highly selective, rapid flow-injection spectrophotometric method for the determination of iron (II) and total iron has been proposed. The method was based on the reaction between iron (II) and 2', 3, 4', 5, 7-pentahydroxyflavone in slightly acidic solution with a strong absorption at 415 nm. The carrier solution used was 1 x 10(-5) M 2', 3, 4', 5, 7-pentahydroxyflavone in 0.1 M HAc/Ac- buffer solution at pH 4.5. Parameters that affect simultaneously the determination of iron (II) and interfering ions were tested. The relative standard deviation for the determination of 50 mu g L-1 iron (II) was 0.85 % (n = 10), and the limit of detection (blank signal plus three times the standard deviation of the blank) was 3 mu g L-1, both based on injection volumes of 20 mu L. The method has been successfully applied to the determination of iron (II) and total iron in water samples and ore samples. The method was verified by analysing a certified reference material Zn/Al/Cu 43XZ3F.