Determination of Tobacco Chemical Components by Near Infrared Spectrum Method

A quick and nondestructive method of using near-infrared (NIR) diffuse reflectance spectroscopy was presented to determine the contents of 4 components in tobacco. Partial least square (PLS) was utilized to build the calibration models between the spectra information and chemical values of each component based on the calibration set consisted of 205 samples. The Relative coefficient for potassium, chlorine, nicotine and total-nitrogen in order were of 0.979, 0.981, 0.976 and 0.973. Average relative error was 3.34% for potassium, 3.68% for chlorine, 4.13% for nicotine and 3.14% for total-nitrogen. The reproducibility and calibration transfer test show that the presented method is accurate, reliable, convenience and nondestructive.