Analisis Kadar Air pada Susu Bubuk Kemasan Menggunakan Metode Near Infrared Spectroscopy dan Kemometrik

This study aims to evaluate the feasibility of using Near Infrared Spectroscopy (NIR) for measuring moisture content in powdered milk. The experiment involved creating simulated powdered milk samples by spraying water onto packaged milk powder. The moisture content of the samples was then measured using NIR spectroscopy and gravimetry. Results indicate that NIR spectroscopy is an accurate and reliable method for measuring moisture content in powdered milk, with a strong correlation between the two measurement methods. The experiment utilized 18 training samples with water concentrations ranging from 1-9% and 6 test samples with water concentrations of 3-7%. The NIR spectra of the samples were analyzed using three different calibration models: PLS, PCR, and SVR. The PLS model proved to be the most accurate, with an R-squared value of 0.9346 and an RMSE value of 0.4392. The PLS model was then applied to measure the moisture content in three real powdered milk samples. The results showed no significant difference between the moisture content measured by NIR spectroscopy and gravimetry, demonstrating that NIR spectroscopy is a viable method for determining the moisture content of powdered milk in real-world applications.