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Color reaction
About: Color reaction is a research topic. Over the lifetime, 1194 publications have been published within this topic receiving 19579 citations.
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TL;DR: In this article, the effect of mixed surfactants on the color reaction between nickel(II) and o-hydroxyhydroquinonephthalein(Qnph) was examined in weakly basic media.
Abstract: The effect of mixed surfactants on the color reaction between nickel(II) and o-hydroxyhydroquinonephthalein(Qnph) was examined in weakly basic media. The color development of the metal complex in the presence of cationic and nonionic surfactants (mixed micellar media of Zephiramine (Zp) and Tween 20) was very stable and exhibited a high and reproducible absorbance. The calibration curve was linear in the ranges of 0 – 7.0 μg nickel(I1) in a final volume of 10 ml at 545 or 536 nm. The method developed does not require an organic solvent extraction step. The apparent molar absorptivity and Sandell sensitivity were 1.26 × 105 1 per mol per crn and 0.0045 μg per cmL nickel(II), respectively, at 545 nm.
3 citations
3 citations
TL;DR: In this paper, a spectrophotometric method for determination of beryllium inμg quantities is described which is based on color reaction between beryellium and rufigallol having maximum absorption at 530 nm.
Abstract: A spectrophotometric method for determination of beryllium inμg quantities is described which is based on color reaction between beryllium and rufigallol having maximum absorption at 530 nm. Comparing various solvents, the suitable medium found is DMSO-H2O (3 ∶ 2). Interference of Al, Zr, Th, Hf and many other cations have been removed by solvent extraction of their oxinates with chloroform.
3 citations
3 citations