Abstract
Spreading sales of counterfeited fatty-oil foods leads to a development of portable and operational analyzer of typical fatty acids (FA) which may be a near infrared (NIR) spectrometer. In this work the calibration models for prediction of named FA were built with the spectra of FT-NIR spectrometer for different absorption bands of the FA. The best parameters were obtained for the wavelength sub-band 1.0-1.8 μ, which includes the 2nd and 3rd overtones of C-H stretching vibrations (near 1.7 and 1.2 μ) and the combination band (1.42 μ). Applicability of the portable spectrometer based on linear NIR array photosensor for the quality analysis of spread, butter and fish oil by the typical FA has been tested.
Highlights
Spreading sales of counterfeited fatty-oil foods leads to a development of portable and operational analyzer of typical fatty acids (FA) which may be a near infrared (NIR) spectrometer
Determination of individual fatty acids (FA), and the groups of them in food products and supplements have been made in recent studies [1,2] using FT spectrometer in the near infrared (NIR) spectral region for a variety of overtones and combinations of fundamental vibrations of C-H, C = C, C = O with the use of multivariate calibration on projections to latent structures (PLS)
The aim of this work was to study the efficiency of calibration models built with different FA absorption bands, and the applicability of NIR spectrometer with linear G9213S photosensor, Hamamatsu, Japan, as a prototype of a portable quality analyzer of spread, butter and fish oil on content of FA: butyric C4:0, myristic C14:0, palmitic C16:0, oleic C18:1, and the amount of polyene :3 C20:5+C22:6
Summary
Spreading sales of counterfeited fatty-oil foods leads to a development of portable and operational analyzer of typical fatty acids (FA) which may be a near infrared (NIR) spectrometer. Efficiency of FA prediction using different absorption bands of overtones and combinations in these works has not been studied, which prevents the selection of optimal technical conditions for creation of portable NIR spectrometer, eg with the linear InGaAs array photosensor.
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