Aqueous ionic effects on near-infrared absorption spectra and chemical imaging

Abstract

The near-infrared (NIR) imaging of aqueous acid-base reaction using concentration regression models, wavelength selection algorithms, spectra transfer, and fitting is presented. The near-infrared spectra and concentration regression proposed methods of each acid, base and salt were converted into near-infrared images of concentration and diffusion fitting predictions. The study aims to qualitatively investigate the aqueous ionic effects of acid-base solutions using near-infrared absorption of spectra and images. The comparison was based on the acid-base formed salt concentration images during neutralization reaction between acids of H2SO4 and HCl, bases of NaOH and KOH, and salts of Na2SO4 and KCl.