pH dependence of the crystal violet adsorption isotherm at the silica-water interface

Article Abstract:

The pH-dependent isotherms for the charged chromophore crystal violet, CV(super +) are measured with three different bases by a free-running cavity implementation of evanescent wave cavity ring-down spectroscopy. The adsorption isotherms are interpreted in terms of cooperative binding adsorption allowing more than one ionic species to bind to each silanol group.

United Kingdom, Industrial sand, Silica & Silica Sand, Industrial Sand Mining, Observations, Silica, Water chemistry, Silicon dioxide

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Evanescent-wave cavity ring-down investigation of polymer/solvent interactions

Article Abstract:

A study is carried out to measure the interfacial phenomena when methanol or water is placed in contact with a film of poly(dimethylsiloxane) (PDMS) by using the evanescent-wave cavity ring-down spectroscopy (EW-CRDS). The findings show that delamination of the film from the fused-silica substrate dominates the optical losses in the case of methanol.

All Other Basic Organic Chemical Manufacturing, California, Methanol, Analysis, Optical properties, Reflectance spectroscopy, Structure, Aliphatic polymers

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