Journal ArticleDOI
Sorption and preconcentration of metal ions in ethanol solution with a silica gel surface chemically modified with benzimidazole.
TLDR
The adsorption isotherms of MCl(2) and FeCl(3) by silica gel chemically modified with benzimidazole molecules were studied in ethanol solution and the material was applied in the preconcentration of metal ions from commercial ethanol normally used as engine fuel.About:
This article is published in Talanta.The article was published on 1995-11-01. It has received 87 citations till now. The article focuses on the topics: Silica gel & Metal ions in aqueous solution.read more
Citations
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Journal ArticleDOI
Chemical modification of silica surface by immobilization of functional groups for extractive concentration of metal ions.
TL;DR: Increased utilization of mechanically stable synthetic matrices particularly silica gel as a solid support and its surface modification by impregnation of organic ligands directly or covalent grafting through spacer unit for extractive concentration of trace elements are highlighted in the present article.
Journal ArticleDOI
Chemically modified silica gel with aminothioamidoanthraquinone for solid phase extraction and preconcentration of Pb(II), Cu(II), Ni(II), Co(II) and Cd(II).
TL;DR: In this article, the metal sorption properties of modified silica were studied towards Pb(II), Cu(II, Ni(II) and Co(II); the determination of metal ions was carried out on FAAS.
Journal ArticleDOI
Mesoporous silica functionalized with 2-mercaptopyridine: Synthesis, characterization and employment for Hg(II) adsorption
TL;DR: In this paper, mesoporous silicas (SBA-15 and MCM-41) have been functionalized by two different methods: using the heterogeneous route, the silylating agent, 3-chloropropyltriethriethoxysilane, was initially immobilized onto the mesophorous silica surface to give the chlorinated mesoporus silica Cl-SBA 15 or Cl-MCM 41, and in a second reaction a multifunctionalized N, S donor compound (2-mercaptopyridine,
Journal ArticleDOI
Atomic spectrometric methods for the determination of metals and metalloids in automotive fuels--a review.
Maria das Graças Andrade Korn,Denilson Santana Sodré dos Santos,Bernhard Welz,Maria Goreti R. Vale,Alete Paixão Teixeira,Daniel C. Lima,Sergio Luis Costa Ferreira +6 more
TL;DR: The main atomic spectrometric techniques used for trace metal and metalloid determination in fuels, particularly atomic absorption spectrometry with flames, graphite furnaces and with chemical vapor generation, and inductively coupled plasma coupled with optical emission and mass spectrometer are presented, including the different sample preparation procedures proposed for these techniques.
Journal ArticleDOI
Adsorption of cadmium(II) from aqueous media onto a mesoporous silica chemically modified with 2-mercaptopyrimidine
TL;DR: In this paper, a mesoporous silica (SBA-15) has been chemically modified with 2-mercaptopyrimidine using the homogeneous route, and the resulting material has been employed as a Cd(II) adsorbent from aqueous solutions at room temperature.
References
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Journal ArticleDOI
Concentration, separation and determination of scandium, zirconium, hafnium and thorium with a silica-based sulphonic acid cation-exchanger.
TL;DR: Zirconium and hafnium have been determined in the solvent phase by X-ray fluorescence and atomic-emission methods, and a spectrophotometric method has been developed for their determination.
Journal ArticleDOI
Preconcentration of cobalt(II) in natural waters with 1-nitroso-2-naphthol supported on silica gel.
Kikuo Terada,Kazumitsu Nakamura +1 more
TL;DR: A solid chelating material, 1-nitroso-2-naphthol supported on silica gel, provides a rapid and highly selective mean of preconcentrating cobalt(II) fro.
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Immobilization of 5-methylene-2-(2′-thiazolylazo)-anisole on silica and its application in preconcentration of palladium
TL;DR: In this paper, the authors showed that the chelating silica is selective for palladium(II) and used it to preconcentrate and separate palladium from synthetic solution containing traces of palladium and large amounts of copper.
Journal ArticleDOI
Solvent Effect of Methanol on the Rate of Formation Reaction of Monochloroiron(III) Complex in Aqueous Solution
Goro Wada,Yaeko Kobayashi +1 more
TL;DR: In this paper, the authors measured the rate constants of the formation reaction of FeCl2+ complex from Fe(III) and Cl− ion using a stopped-flow spectrophotometer.
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Esr study of cucl2 adsorbed on a chemically-modified silica-gel surface with benzimidazole molecule
TL;DR: The ESR spectrum of CuCl 2 adsorbed onto a silica gel surface chemically modified with the benzimidazole molecule showed that the surface complex has an octahedral symmetry with tetragonal distortion as discussed by the authors.