Short-Wave Near-Infrared Spectroscopy of Milk Powder for Brand Identification and Component Analysis

Original short-wave near-infrared spectra of milk powder.

Score plot for first 3 principal components (401 to 1,000nm) of 7 brands of milk powder.

Short-wave near-infrared spectra of brands 5 and 7 after the standard normal variate pretreatment.

Short-wave NIR spectra of brands 1 to 4 and 6 after the standard normal variate pretreatment.

Correlation between predicted and measured values for fat content for the prediction set obtained by the least squares support vector machine process.

Correlation between predicted and measured values for protein content for the prediction set obtained by the least squares support vector machine process.

Correlation between predicted and measured values for carbohydrate content for the prediction set obtained by the least squares support vector machine process.