Su örneklerindeki Cu(II), Co(II), Fe(III) ve Ni(II) iyonlarının Schiff bazı komplekslerinin katı-faz ekstraksiyonu yönteminden sonra ICP-OES ile tayini

Abstract

Bu çalışmada; saf su örneklerine ilave edilen belli derişimde Co(II), Cu(II), Fe(III) ve  Ni(II) iyonlarının sulu ortamdan giderimi araştırılmıştır. İlk olarak 4-metoksisalisilaldehit ve 4-aminoantipirin bileşiklerinin tepkimesi sonucu 4-{2-hidroksi-4-metoksi-benziledenamino}-1,5-dimetil-2-fenil-1-H-pirazol-3(2H)-on (Schiff bazı) sentezlenmiştir. Sentezlenen Schiff bazı metal komplekslerine dönüştürülmüş ve UV-Gör bölgedeki absrobsiyon artışları belirlenmiştir. Ardından komplekslerin sulu fazdan absorpladığı metal iyonu derişimini bulmak için katı faz ekstraksiyonu işlemi uygulanmış ve ekstraksiyon sonrası sulu fazda kalan metal iyonu derişimleri ICP-OES ile mg/L düzeyinde tayin edilmiştir. Bu sonuçlara göre; dört metal iyon için komplekse ait optimum şartlar; metal-ligant bağlanma oranı (Job’s metodu): 1/2, reaksiyon süresi:  15 dakika, pH: 6.5, reaksiyon sıcaklığı: 25 ºC olarak bulunmuştur. Ayrıca ekstraksiyon yöntemi için geri kazanım değerleri 0.25, 1.0 ve 10 mg/L konsantrasyonda Co(II), Cu(II), Fe(III) ve Ni(II)  iyonları için ayrı ayrı uygulanmıştır. En iyi verim 0.25 mg/L konsantrasyondaki çözeltiler için en düşük  %85.2 en yüksek %96.8 olarak bulunmuştur.

Keywords

• Ağır metal
• Schiff bazı
• ICP-OES
• UV-Görünür Spektrofotometre
• Katı faz ekstraksiyonu
• Aminoantipirin
• Salisilaldehit

Determination of Cu (II), Co (II), Fe (III) and Ni (II) ions by ICP-OES after solid-phase extraction of their Schiff complexes in water samples

Abstract

In this study, the removal of Co (II), Cu(II), Fe(III) and  Ni(II) ions from the aqueous medium at a certain concentration added to the pure water samples was investigated. Firstly, 4-{2-hydroxy-4-methoxy-benzyldene-amino}-1,5-dimethyl-2-phenyl-1-H-pyrazole-3(2H)-one (Schiff base) was synthesized between 4-methoxysalicylaldehyde and 4-aminoantipyrine compounds. Synthesized Schiff base was transformed into metal complexes and the increase in absorptivity in the UV-vis region was determined. Then, solid phase extraction was performed to find the metal ion concentration that the complexes absorbed from the aqueous phase, and the metal ion concentrations remaining in the aqueous phase after the extraction were determined in mg/L level with ICP-OES. According to these results; optimum conditions for the complex for four metal ions; metal-ligand binding ratio (Job’s method): 1/2, reaction time: 15 minutes, pH: 6.5, reaction temperature: 25 ºC. In addition, the recovery method was applied separately for Co (II), Cu (II), Fe (III) and Ni (II) ions at a concentration of 0.25, 1.0 and 10 mg/L. The best yield was found to be 85.2% and 96.8% for solutions at 0.25 mg/L concentration.

Keywords

• Heavy metal
• Schiff base
• ICP-OES
• UV-Visible Spectrophotometer
• Solid phase extraction
• Aminoantipyrine
• Salicylaldehyde

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