Non-extractive derivative spectrophotometric determination of cobalt in neutral micellar medium

Singh, Har Lal; Agnihotri, Narinder Kumar; Singh, Vinay

doi:10.1016/s0039-9140(98)00286-0

Cited by 32 publications

(14 citation statements)

References 30 publications

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“…In spite of this, the use of mixed reagent systems could be considered as an alternative means to extend the applicability of spectrophotometric multicomponent determination. Various organic solvents were reported for the spectrophotometric determination of iron, based on the formation of colored binary complexes in aqueous medium, extraction into organic solvents and enhancement of complex absorbance with surfactants or miceller media [21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, spectroscopic and thermal characterization of Fe(III)-mixed ligand complexes and spectrophotometric determination of Fe(III) in various samples

Mohamed

Hindy²,

Rizk

et al. 2014

Eur. J. Chem.

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KEYWORDSThe aim of the present study is to find a non time consuming, economical and reliable spectrophotometric procedures using commercially available spectrophotometric reagents for the determination of Fe(III) ions. The methods are based on the formation of colored ternary complexes using, 1,10-phenanthroline and eriochrome black T or tartrazine mixed reagents and improved using a cationic surfactant, cetyltrimethyl ammonium bromide. This surfactant interacts with the complex to build up true ternary complex. The most suitable conditions for determination of Fe(III) ions and the parameters affecting the reactions including pH, time, temperature, stoichiometric ratios and reagents concentrations are optimized. The effect of different interfering ions is studied together with the suitable masking agents. The developed methods are used for the determination of Fe(III) ions in the presence of cetyltrimethyl ammonium bromide in different types of water (polluted industrial waste, ground, river Nile and drinking water). The synthesis and spectroscopy studies of two Fe complexes were reported. Thermal analysis was carried out in order to give an idea about the thermal stability of the complexes.

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Section: Introductionmentioning

confidence: 99%

Synthesis, spectroscopic and thermal characterization of Fe(III)-mixed ligand complexes and spectrophotometric determination of Fe(III) in various samples

Mohamed

Hindy²,

Rizk

et al. 2014

Eur. J. Chem.

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“…In the metal-dye complex, at a concentration above critical micelle concentration (CMC) micelles form a ternary complex with advantageous properties, such as hypsochromic and bathochromic shifts that can modify the sensitivity of the method by affecting the interferences and matrix effects 6,7 . The ability of Micellar system to solublize slightly soluble or even insoluble complexes has been used to enhance the analytical merit of developed method.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Spectrophotometric Determiantion of Eosin and Erythrosine with Cr(VI) Reagent in Micellar Media Using Mean Centering of Ratio Spectra

Kaur¹,

Gupta²

2012

Chem Sci Trans

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Spectrophotometric method is described for the simultaneous determination of binary mixtures of eosin and erythrosine in pharmaceutical and food samples, without prior separation steps, using mean centering of ratio spectra. The method is based on the difference in the absorption spectra for the products of the reaction of eosin and erythrosine with Cr(VI) in the presence of CPB micellar media at pH 6.0. The method allows rapid and accurate determination of eosin and erythrosine. The results showed that the method was capable to simultaneous determination of 1.24-6.86 µg/mL and 1.47-8.06 µg/mL each of eosin and erythrosine. The proposed method was successfully applied to the simultaneous determination of eosin and erythrosine in pharmaceutical and food samples.

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“…However, in larger amounts it is toxic and causes pulmonary disorders, dermatitis, nausea and vomiting. 1 In the determination of trace cobalt, various methods including ICP-MS, 2 spectrofluorometry, 3 ICPAES, 4 differential pulse voltammetry, 5 anodic stripping voltammetry, 6 and GFAAS 7 have been used. Among these techniques, GFAAS, ICP-MS, and anodic stripping voltammetry can be directly applied to the determination of Co at the ng mL -1 level.…”

Section: Introductionmentioning

confidence: 99%

Column Preconcentration and Determination of Cobalt(II)Using Silica Gel Loaded with 1-Nitroso-2-naphthol

Shin¹,

Choi

2009

Bulletin of the Korean Chemical Society

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A sensitive technique for the determination of trace Co(II) in various samples after column preconcentration by adsorbing onto silica gel loaded with 1-nitroso-2-naphthol was developed. Several experimental conditions, such as pH of sample solution, the amount of silica gel loaded with 1-nitroso-2-naphthol, the flow rate for adsorption and so forth, were optimized. The interfering effects of diverse concomitant ions were investigated. Fe(III) interfered with more than any other ions, but the interference by Fe(III) was completely eliminated by adjusting the amount of silica gel loaded with 1-nitroso-2-naphthol to 0.30 g. The dynamic range, the correlation coefficient (R 2 ), and the detection limit obtained by the proposed technique were 3.0-140.0 ng mL -1 , 0.9942, and 1.81 ng mL -1 , respectively. For validating the technique, the aqueous samples (tap water, reservoir water, stream water, and wastewater) and the plastic samples were used as real samples. Recovery yields of 93.0-107.0% were obtained. These measured data were not different from ICP-MS data at the 95% confidence level by F test. Based on the results of the experiment, it has been found that the proposed technique can be applied to the determination of Co(II) in various real samples.

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Non-extractive derivative spectrophotometric determination of cobalt in neutral micellar medium

Cited by 32 publications

References 30 publications

Synthesis, spectroscopic and thermal characterization of Fe(III)-mixed ligand complexes and spectrophotometric determination of Fe(III) in various samples

Synthesis, spectroscopic and thermal characterization of Fe(III)-mixed ligand complexes and spectrophotometric determination of Fe(III) in various samples

Simultaneous Spectrophotometric Determiantion of Eosin and Erythrosine with Cr(VI) Reagent in Micellar Media Using Mean Centering of Ratio Spectra

Column Preconcentration and Determination of Cobalt(II)Using Silica Gel Loaded with 1-Nitroso-2-naphthol

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