THE INVESTIGATION OF THE MILK SPECTRAL LUMINESCENT PROPERTIES IN POLARIZED LIGHT

Abstract

For efficient milk production, the obtained products and technological processes of milking and primary processing quality control is important. It can be carried out by optical luminescent methods. Luminescent polarization spectroscopy is used to various biological objects for diagnosing. The purpose of this study is spectral luminescent method using for milk diagnosis’s possibilities to explore. There for measurements drinking pasteurized milk was taken. The excitation and luminescence’s spectra by diffraction spectrofluorimeter using were measured. The spectra’s integral parameters such as photoluminescence Φ flows, from the obtained spectral characteristics were determined. There in the milk excitation spectrum four main peaks clearly were distinguished: 290 nm, 324 nm, 360 nm and 445 nm. There at photoluminescent characteristics’ measuring for excitation by 290 nm wavelength’s radiation, after polarizer’s introducing the luminescence was completely absent. The analyzer’s position changing does not affect radiation’s qualitative and quantitative characteristics, that by unpolarization of milk luminescent radiation can be explained. There at λ=324 nm radiation exciting, the photoluminescence spectrum in the region of 500-600 nm in compared to unpolarized excitation is distorted. The photoluminescence spectra at λ=360 nm and λ=445 nm are qualitatively similar for polarized and unpolarized excitation. Therefore at methods and devices for milk luminescent quality control further developing, it is necessary its polarizing properties taking into account, especially at the spectrum’s short wavelength range being.