Moisture content analysis is critical to the quality of a variety of products spanning diverse industries, and it’s accurate measurement remains a common analytical challenge.
Commonly used quantitative methods, such as loss-on-drying (LOD) and Karl Fischer titration, while effective for off-line moisture content analysis, are not suited for rapid in-line process control environments. Spectroscopic measurement techniques, and in particular near-infrared (NIR) spectroscopy, are highly effective non-destructive means for obtaining crucial moisture content in difficult environments.
Applications are varied, and include more common analyses of moisture in agricultural crops and silage, foodstuffs, paper and pulp products, and pharmaceuticals. Some newer applications have developed largely due to the advent of miniaturized diode-based technology, such as the detection of moisture and ice on road surfaces from a spectrometer in a moving automobile.
A water molecule has numerous vibrational modes, and therefore, water has many absorption bands spanning the infrared range. Fundamental bands in the infrared range absorb strongly, and the corresponding overtones in the near-infrared absorb more weakly, but provide the opportunity for moisture to be sampled in materials in an intact form, without dilution.
A process-ready NIR spectrometer system from tec5USA is a vital addition to your process analytical toolbox.