Spectrophotometric Determination of Copper as Copper Piperazine

Abstract

Spectrophotometric method for determination of Cu(II) in the trace quantities was developed by using piperazine as ligand in ammonium acetate medium. The Procedure developed was applied for the estimation Cu(II) in microgram quantities in the samples of alloys and the method was found to be simple, rapid and comparable to routine analytical methods for trace level analysis of metal ions in environmental samples in any laboratory where sophisticated and expensive instruments are not available. UV visible spectrophotometer is cost effective and available in almost all laboratories. The complexes of piperazine in aqueous solutions are not reported so far and this is the first attempt in this area of spectrophotometric analysis.

Spectrophotometric Determination of Cu(II) by Complex with Ethyl Cyano(2-Methyl Carboxylate Phenyl Azo Acetate) (ECA)

“…To obtain optimum results, the order of addition of base should be the first followed by addition of ligand and Cu(II). The results were shown in Table (4).…”

“…The stoichciometry of the complex between Cu(II) and ligand was investigated using Job's method and mole ratio method; the results show that 1:2 Cu(II) to ligand complex was formed. The formation of the complex produced suggest occurring as follows, Figure (4) [14].…”

“…Copper is a reddish metal with a face centered cubic crystalline structure [1,2]. It is one of the several metals that play an important role in the biological systems, it occurs naturally which in many vegetables, meat and grains [3,4]. Copper is a mineral that nowadays possess few problems.…”

Synthesis of the New 2-[6-Nitro 2-Benzothiazolylazo]-4-Hydroxy Benzoic Acid Organic Reagent for Spectrophotometric Determination of Copper(II)

“…It is an essential nutrient or a toxic element for human beings, depending on the concentration level [1,2]. Some chromogenic reagents have been used in spectrophotometric methods of determination of copper such as Acetophenone-p-chlorophenylthiosemicarbazone [3], Hydrazinecarboxymide2-[(2-hydroxyphenyl) methylene (HC22HPM) [4], Piperazine [5], Chloro(phenyl) glyoxime [6], sodium(I) diethyldithiocarbamate [7], brilliant cresyl blue(BCB) [8], cefixime [9], 4-(6-Bromobenzothiazolylazo)Orcinol [10], 3-(2′-thiazolylazo)-2,6-diaminopyridine [11], 2-[2-(4-methylbenzothiazolyl)azo]-5-dimethylaminobenzoic acid [12], 2[2-(5-bromo thiazolyl) azo]-4-methoxy phenol [13], and 2,6-dichlorophenolindophenol [14]. Thiazolylazo compounds have attracted the attention, as they are sensitive chromogenic reagents in addition to being important complexing agents.…”