Modeling the Dichromatic Behavior of Bromophenol Blue to Enhance the Analytical Performance of pH Colorimetric Sensor Arrays
Andrea Pastore, Denis Badocco, Luca Cappellin, Paolo Pastore
Abstract
The dichromatism of Bromophenol blue (BPB) was investigated by varying its concentration in the absence and presence of surfactant. A model of the indicator behavior was carried out, justifying the experimental shapes of the sigmoidal profiles of the hue (H) coordinate. The model applied to the solution was compared with the performance of colorimetric sensor arrays (CSAs) with increasing BPB concentrations. The H shape and the prediction errors of the CSAs were very similar to those predicted. The experimental results enable the changing of the slope of the calibration profiles, at will, by varying only the BPB concentration.
Topics & Concepts
Bromophenol bluePulmonary surfactantHueCalibrationColorimetryChemistryColorimetric analysispH indicatorChromatographyMaterials scienceAnalytical Chemistry (journal)Biological systemOpticsMathematicsOrganic chemistryPhysicsBiochemistryBiologyStatisticsAdvanced Chemical Sensor TechnologiesAnalytical Chemistry and SensorsAnalytical Chemistry and Chromatography