Abstract
Based on benzoylacetone synthesized 1-phenyl-2- [2-hydroxy-3-sulfo-5-nitrophenylazo] 1,3-butadione (PHSNPAB). Studied complex formation of copper (II) with 1-phenyl-2- [2-hydroxy-3-sulfo-5-nitrophenylazo] 1,3-butadione (PHSNPAB) in the presence and absence of the third component such as cetylpyridinium chloride (CPCl), cetylpyridinium bromide (CPBr) and cetyltrimethylammonium bromide (CTMABr). Single ligand complexes are formed at pH = 3, λ = 444nm, and mixed ligand complexes at pH = 2 λ = 456, 454, and 461 nm, respectively (CPCl, and CPBr, CTMABr). İdentified the relations of the reacting components in homogeneous composition of Cu-R (1: 2) and mixed ligand Cu-R-CPCl (1: 2: 2), Cu-R-CPBr (1: 2: 2) and Cu-R-CTMABr (1 2: 1) complexes, which concentration interval subordinated to Beer's law. The influence of external ions and masking substances on complex formation was studied. Method for the photometric determination of copper in the rocks was established.
Highlights
Azo compounds are important, well-known and commonly used compounds in textile, paper industries and as dying agent in food and cosmetic industries
It is known from literature that, azo derivatives of benzoylacetone are widely used in photometric determination of elements [6,7,8]
The purpose of the following work is the development of photometric determination method for identifying copper (II) with PHSNPAB in the presence and in the absence of the third component
Summary
Well-known and commonly used compounds in textile, paper industries and as dying agent in food and cosmetic industries. Complex formation, CPCl, CPBr, CTMABr, stability constant. All methods showed that the ratio of Cu (II) -R in binary complexes is 1: 2, and in mixed-ligand complexes Cu (II)-R-CPCl = 1: 2: 2, Cu (II) -R-CPBr = 1 : 2: 2, Cu(II)-R-CTMABr = 1: 2: 1.
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