Comparative evaluation of accuracy in near-infrared and Raman spectroscopic determinations of component concentration in packed solid mixtures under various packing densities.

Background: Physical characteristics of packed samples, such as packing density, influence subsequent near-infrared (NIR) and Raman spectral features. This potential decrease in accuracy is a concerning issue in practical applications, such as the analysis of pharmaceutical tablets using vibrational spectroscopy. Thus, we compared the accuracy tolerances of both methods under varying packing densities.

Intelligent color image analysis of sintered ores for simple and rapid determination of FeO concentration.

A simple determination of the FeO concentrations of sintered ores using color images of the samples has been explored. Sintered ore is mainly composed of FeO (red), FeO (black), and other white inorganic oxides, so the color of sintered ore could be representative of the relative abundance of the constituents. Two important challenges were addressed to achieve reliable quantitative color image analysis.