Rapid Spectrophotometric Determination of Zirconium(IV) with 2,2,3,4-tetrahydroxy–3 -sulpho–5-chloroazobenzene in Alloys
A. Ali HÜSEYİNLİ,1†Fitnat KÖSEOĞLU,2 and Ülkü Dilek UYSAL1
1† Anadolu University, Faculty of Sciences, Department of Chemistry, 26470, Eskişehir, Turkey (E-mail: ahuseyin@anadolu.edu.tr)
2 Gazi University, Gazi Education Faculty, Teknikokullar, 06500, Ankara, Turkey
New o,o/–monoazo reagents have been synthesized using pyrogallol and 2-aminophenol-6-sulphonic acid or its derivatives. Spectrophotometric properties of the complexes formed by the reaction of synthesized monoazo reagents with Zr4+ have been investigated. According to the results it is found that the most sensitive and selective ligand for the Zr4+ is 2,2/,3,4-tetrahydroxy–3/-sulpho–5/-chloroazobenzene (tetrahydroxyazon SCl) and it was used for the direct spectrophotometric determination of Zr4+ion. Tetrahydroxyazon SCl reagent forms a red complex with Zr4+ ion in acidic media up to pH 6. The complex formation is fast and its absorbance reaches to a level immediately where remains constant for more than three days. The metal (M):ligand (L) ratio of the formed complex is 1:1 and the optimal wavelength of the
complex is 496 nm. Under optimum conditions Zr4+ ion acts in accordance with the Beer law at an ion concentration range of 0.08-3.20 μg/mL. The molar absorptivity was found as 34500 Lmol-1cm-1. The determination of Zr4+ was not interfered by Cu2+, Cd2+, Pb2+, Ni2+, Cr3+, Zn2+, Bi3+, U6+, Th4+, Al3+, Be2+, Co2+, Mn2+, Hg2+, halides, phosphates, sulfates, thiocyanides, urea, tartrate, ascorbic acid etc. This method is highly sensitive, selective, very rapid and a simple technique. It has been successfully applied to the determination of Zr4+ ion in an aluminum based certified alloys.
A. Ali HÜSEYİNLİ,1†Fitnat KÖSEOĞLU,2 and Ülkü Dilek UYSAL1
1† Anadolu University, Faculty of Sciences, Department of Chemistry, 26470, Eskişehir, Turkey (E-mail: ahuseyin@anadolu.edu.tr)
2 Gazi University, Gazi Education Faculty, Teknikokullar, 06500, Ankara, Turkey
New o,o/–monoazo reagents have been synthesized using pyrogallol and 2-aminophenol-6-sulphonic acid or its derivatives. Spectrophotometric properties of the complexes formed by the reaction of synthesized monoazo reagents with Zr4+ have been investigated. According to the results it is found that the most sensitive and selective ligand for the Zr4+ is 2,2/,3,4-tetrahydroxy–3/-sulpho–5/-chloroazobenzene (tetrahydroxyazon SCl) and it was used for the direct spectrophotometric determination of Zr4+ion. Tetrahydroxyazon SCl reagent forms a red complex with Zr4+ ion in acidic media up to pH 6. The complex formation is fast and its absorbance reaches to a level immediately where remains constant for more than three days. The metal (M):ligand (L) ratio of the formed complex is 1:1 and the optimal wavelength of the
complex is 496 nm. Under optimum conditions Zr4+ ion acts in accordance with the Beer law at an ion concentration range of 0.08-3.20 μg/mL. The molar absorptivity was found as 34500 Lmol-1cm-1. The determination of Zr4+ was not interfered by Cu2+, Cd2+, Pb2+, Ni2+, Cr3+, Zn2+, Bi3+, U6+, Th4+, Al3+, Be2+, Co2+, Mn2+, Hg2+, halides, phosphates, sulfates, thiocyanides, urea, tartrate, ascorbic acid etc. This method is highly sensitive, selective, very rapid and a simple technique. It has been successfully applied to the determination of Zr4+ ion in an aluminum based certified alloys.
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