Applied microwave power estimation of black carrot powders using spectroscopy combined with chemometrics

The level of applied microwave power is a critical parameter for the quality of the dried product in microwave drying. It is impossible to assess the applied power of the dried product with the naked eye. This work aimed to predict the applied power of black carrot powders using a chromameter and near-infrared reflectance spectroscopy with partial least squares regression. A good correlation was found between applied power, color parameters, and near-infrared reflectance. The near-infrared spectroscopy predicted the applied power with better performance (R-2 = 0.99) and can be utilized to appraise the applied power of black carrot powders with acceptable accuracy.