We report on the adsorption of sodium dodecyl sulfate (SDS) onto functionalized graphene sheets (FGSs) in an aqueous system, measured at broad SDS and FGS concentration ranges by conductometric surfactant titration. At dilute SDS concentrations (<12 μM in bulk solution), there is evidence of a counterion exchange between hydronium ions (from the dissociation of acidic chemical functionalities o...

The present investigation is an attempt to synthesize and characterize the ligand 4-chloro-2-[(2furanylmethyl) amino]-5-sulfamoylbenzoic acid, and its Fe-III and Co-II complexes. The nature of bonding and the geometry of the complexes have been deduced from elemental analysis, magnetic moment measurements and conductivity measurements. Conductometric titrations have suggested metal-ligand ratio...

Quantitative determination of Brønsted acid sites in acidic mordenite samples with varying proton concentrations has been studied using aqueous conductometric titration method. Conductometric titration of the ammonium form of mordenite with sodium hydroxide is feasible and the results indicate potential number of Brønsted acid sites. However, Brønsted acid sites concentration in acidic mordenit...

A combined detection system of simultaneous contactless conductometric and fluorescent detection for capillary electrophoresis (CE) has been designed and evaluated. The two processes share a common detection cell. A blue light-emitting diode (LED) was used as the excitation source and an optical fiber was used to collect the emitting fluorescence for fluorescent detection (FD). Inorganic ions, ...

Metal complex of pioglitazone hydrochloride (PLZ) drug with Ni(II) ion is synthesized and characterized using analytical data, molar conductance, IR, UV-Vis, magnetic, mass spectral and XRD studies. From the analytical data, the complex is proposed to have general formula [(C 19 H 19 N 2 O 3 S)+ 2 Ni]2Cl-. The conductometric titration using monovariation method reveals that complex is L 2 M typ...

The encapsulation of small hydrophilic molecules offers advantages for the delivery food supplements and ingredients. These include: masking off-flavors, reducing astringency , controlling release profiles. We used an internal phase separation (IPS) method simultaneous granulation a supplement in corn oil. To prove that IPS is suitable with controllable times, we nutritional N -acetylcysteine (...

The current work demonstrates an innovative approach to develop nanocellulose based membranes with high water permeability, mechanical stability and high functionality via (1) tailoring the composition of the support layer of sludge microfibers/cellulose nanofibers (CNFSL) and (2) in situ TEMPO functionalization of the thin functional layer of cellulose nanocrystals (CNCBE) to enhance the metal...

A novel quaternary ammonium-based cationic gemini surfactant (S6) having 1,6 di-bromo hexane as a spacer, have been used and its interaction with insulin in aqueous solution (pH, 7.40) was investigated by several methods including fluorescence spectroscopy, UV-Vis spectroscopy, circular dichroism, dynamic light scattering, ζ-potential measurements, conductivity and transmission electron microsc...