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Vasily G. Amelin, Zen Alabden Chalawi
Shogah, Dmitry S. Bolshakov
Identification and
authentication of cow’s milk powder using a smartphone and chemometric analysis
Abstract
The possibility of identification and
authentication of cow’s milk powder by the method of chemical colorimetry of
the samples’ own fluorescence using a smartphone camera and chemometric
analysis is shown. A fundamental test device for direct colorimetric analysis
of powdered milk is proposed, excluding the stage of sample preparation.
Fluorescence excitation was carried out with a portable source of monochromatic
UV radiation (λ = 365 nm). Colorimetric parameters of powdered milk fluorescence
in RGB space were recorded using a smartphone camera. We used chemometric
processing of the calculated analytical signal, which made it possible to
reduce the analysis time and visualize the study data. The evaluation of the
data array of fluorescence colorimetric parameters (RGB) was carried out by
principal component analysis (PCA) and hierarchical clustering analysis (HCA)
using the XLSTAT software.
Key words: identification and authentication
of cow’s milk powder, digital colorimetry, RGB, smartphone, chemometric
analysis
Copyright (C) Chemistry Dept., Moscow State University, 2002
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