Micellar colorimetric determination of iron, cobalt, nickel and copper using 1-nitroso-2-naphthol

Application of a macromolecular micellar system formed by the P123 triblock copolymer for determination of copper concentrations

“…This result contrasts with the finding of Yun and Choi [11], who found (when examining the effect, of pH on the absorbance of the Cu1N2N complex; in a tween 80 micellar solution) that complex formation, was independent of the hydrogen ion concentration.. These different pH effects corroborate the view, that the chemical nature of the surfactant used; has a strong influence on the behaviour of a complex's absorbance [31].…”

“…J. Chem. • 8 (2) • 2010 • 258-263 DOI: 10.2478/s11532-010-0008-0 the reagent 1-nitroso-2-naphthol (1N2N), forms stable and highly coloured complexes with several metal ions; including Cu(II) [11]. However, these complexes are not soluble in aqueous media, so it is necessary to perform a solvent extraction.…”

Solvatochromism and potentiometic studies of some active nitroso- and nitroso-azo- compounds

“…These molecules have fundamental roles in processes such as catalysis, interaction of drugs with biomolecules and uptake of ions by living organism's [1][2][3][4][5][6][7][8]. Moreover, certain pyrimidine-pyrazoles have been studied in the fight against cancer [9][10][11][12][13][14][15][16][17].…”

A Simple Spectrophotometric Determination of Trace Level Mercury Using 1,5-Diphenylthiocarbazone Solubilized in Micelle

“…11 Nevertheless, the addition of surfactants at concentrations above the CMC to an aqueous medium to form a miceller solution is the most commonly preferred procedure today. A non-ionic surfactant, like Triton X-100 12,19 and Tween-80, 13 have been used for the spectrophotometric determination of several metal ions. Similarly, a few anionic surfactants have been used.…”