Spectrophotometric determination of some lanthanides using 3-hydroxy-2-naphthoic acid azo dyes

N. T.Abdel Ghani, Y. M. Issa, A. A. Salem

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


A comparative spectrophotometric study of the reaction of some substituted phenylazo-3-hydroxy-2-naphthoic acid derivatives with trivalent yttrium, lanthanum, praseodymium, neodymium, samarium, gadolinium, and erbium ions has shown that 1:1 and 1:2 complexes are formed at pH 7-8. Applications of these chelating agents for direct spectrophotometric determination of the lanthanons under investigation and also as indicators for spectrophotometric titration with EDTA were reported. Interference of various cations and anions in this method was also studied. Beer's law was obeyed for metal ions of up to 5-10 ppm.

Original languageEnglish
Pages (from-to)283-288
Number of pages6
JournalMicrochemical Journal
Issue number3
Publication statusPublished - Jun 1989
Externally publishedYes

ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy


Dive into the research topics of 'Spectrophotometric determination of some lanthanides using 3-hydroxy-2-naphthoic acid azo dyes'. Together they form a unique fingerprint.

Cite this