Micelle-mediated extraction for simultaneous spectrophotometric determination of aluminum and beryllium using mean centering of ratio spectra

Spectrophotometric Determination of Cationic Surfactants Based on Their Effect on the Complexes of Chrome Azurol S with Be2+ and Al3+ Cations

“…1 shows the presence of low concentrations of CTAB caused increases in molar absorptivity and red shifts in the wavelength of maximum absorbance for both metal complexes. CSs react by ion pair formation with the anionic Be(CAS) 2 and Al(CAS) 3 to form a ternary complex involving surfactant monomers [22]. Formation of the ternary complexes between Be(CAS) 2 and Al(CAS) 3 and CTAB causes the increases in molar absorptivity and red shifts in the wavelength of maximum absorbance.…”

“…By increasing the CTAB concentration the solutions of both complexes became turbid and the precipitate was formed. As the ion pairs formed between the CS CTAB and the anionic complexes Be(CAS) 2 and Al(CAS) 3 [19][20][21][22] were insoluble, the solution became turbid. In order to solubilize the complexes, non-ionic surfactant Triton X-100 was added to the solution.…”

“…salt; (CAS)) reacts with beryllium and aluminum to form the anionic complexes Be(CAS) 2 and Al(CAS) 3 [19][20][21][22]. Micellar sensitization has been widely exploited for metal chelates with organic analytical reagents containing several acidic groups such as triphenylmethane dyes having a salicylic acid or catechol functional group in the molecule, such as CAS, Eriochrome Azurol B, Eriochrome Cyanine R, Catechol Violet, Pyrogallol Red, and Bromopyrogallol Red, in the presence of various cationic or nonionic surfactants or surfactant mixtures.…”

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

“…Recently, Afkhami and Bahram [8][9][10][11][12][13][14] presented a new spectrophotometric method for the analysis of binary and ternary mixtures, without prior separation steps which called "mean centering of ratio spectra" method 15 . In this paper, we applied mean centering of ratio spectra for simultaneous determination of binary mixtures of eosin and erythrosine without any preliminary separation steps.…”

Micelle-mediated extraction and determination of tin in soft drink and water samples

“…8 Cloud point extraction (CPE) has become one of the most preferred preconcentration steps for enhancing the sensitivity in inorganic analysis and it has been applied to the separation of environmental and biological samples with a complicated matrix. [9][10][11][12][13] CPE is an outstanding alternative to conventional solvent extraction because it produces high extraction efficiencies and preconcentration factors, and uses inexpensive, non-toxic reagents. Several methods have also been reported for the FAAS and GFAAS determination of Sn after cloud point extraction.…”