No abstract

Diffuse near-infrared reflectance spectroscopy has traditionally been an analytical technique for determining chemical compositions in a sample. We will, in this paper, focus on light scattering effects and their ability to determine the mean particle sizes of powders. The reflectance data of NaCl, broken glass, and sorbitol powders are linearized and submitted to the Multiplicative Scatter Correction (MSC), and the ensuing parameters are used in subsequent multivariate calibrations. The results indicate that particle size can, to a large degree, be determined from NIR reflectance data for a given type of powder. Up to 99% of the partical size variance was explained by the regression.

-Skim milk powder is a very valuable industrial ingredient, the properties of which are dependent on process and running conditions. We studied a powder obtained from a third generation dryer, its size fractions, and two experimental binary mixes of fractions for physical properties and use, including flowability. The results indicate special properties for one class, i.e. the [100-112 µm] fraction. The correlation of characteristics is reported, and practical consequences concerning the process and the quality are discussed. propriété physique / poudre de lait écrémé / granulométrie / écoulement