Separation and preconcentration of trace vanadium in aqueous solution using trioctylmethylammonium chloride-loaded silica gel.

Commission on Microchemical Techniques and Trace Analysis Separation and Preconcentration of Trace Substances . I — Preconcentration for Inorganic Trace Analysis

Preparation and application of Ni(ii) ion-imprinted silica gel polymer for selective separation of Ni(ii) from aqueous solution

In the present study, a novel Ni(II) ion-imprinted sulfonate functionalized silica gel polymer was prepared with the surface imprinting technique by using nickel(II) as the template ion, grafted silica gel as the support, and 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) and ethylene glycol dimethacrylate (EGDMA) as the functional monomer and crosslinker, respectively. The sorbent was cha...

Reverse phase partition chromatographic separation of vanadium with N-n-octylaniline on silica gel

A selective, sensitive, less expensive and more precise method was developed for the separation of vanadium [VO] using Nn-octylaniline (liquid anion exchanger) coated silica gel as stationary phase. The quantitative extraction of vanadium was found with 0.065 mol/L N-n-octylaniline and 0.009 to 0.02 mol/L of sodium malonate at pH 10.5. The extracted vanadium ion was eluted from the column with ...

Preconcentration of Trace Vanadium with the Ion Pair of 2-Nitroso-1-Naphthol-4-Sulfonic Acid and Tetradecyldimethylbenzylammonium Chloride Onto Microcrystaline Naphthalene and Determination by Derivative Spectrophotometry

Vanadium is quantitatively retained on 2-nitroso-1-naphhthol-4-sulfonic acid tetradecyldimethlbenzyammonium chloride onto microcrystalline naphthalene in the pH range of 3.0-4.0 from a large volume of aqueous solutions of various alloys and synthetic samples. After filtration, the solid mass consisting of the vanadium complex and naphthalene was dissolved with 5.0 mL of dimethylformamide an...

Application of Modified Nanoclay Sorbent for Separation and Preconcentration Trace Amount of Cobalt

The present article reports on the application of modified organo nanoclay as a green, easily prepared and stable solid sorbent for the preconcentration of trace cobalt ion in aqueous solution. The organo nanoclay was modified by adsorption of 5-(4-dimethyl amino-benzylidene) rhodanin reagent onto it. The sorption of Co2+ ions was quantitative in the pH range of 7.0 to 8.5, whereas quantitative...