TY - JOUR

T1 - Optical Multisensor System Based on Lanthanide(III) Complexes as Near-Infrared Light Sources for Analysis of Milk

AU - Surkova, Anastasiia

AU - Bogomolov, Andrey

AU - Paderina, Aleksandra

AU - Khistiaeva, Viktoria

AU - Boichenko, Ekaterina

AU - Grachova, Elena

AU - Kirsanov, Dmitry

N1 - Publisher Copyright: © 2022 by the authors.

PY - 2022/7/20

Y1 - 2022/7/20

N2 - Optical multisensor systems are easy-to-use and inexpensive analytical devices. In this work, we propose an optical multisensor system based on the luminescence of Nd(III) and Yb(III) complexes in the near-infrared (NIR) spectral region. The observed emission bands play the role of secondary light sources for further analysis of milk—for the determination of fat content and for the recognition of adulteration. The samples for analysis were prepared by putting a drop of milk upon a thin glass covering the powdered mixture of lanthanide complexes, which were excited by a light-emitting diode (LED) in the ultraviolet region (the maximum intensity at 365 nm). The diffuse-reflectance spectra of samples were acquired in the short-wave NIR range 750–1100 nm using a portable NIR spectrometer. The developed optical system was tested using two sets of milk samples with varying concentration levels of fat and added urea. The obtained spectral data were analyzed using a number of multivariate prediction and classification methods of chemometrics and the results were statistically compared. The regression and classification model performances achieved in this proof-of-concept study illustrate the feasibility of the optical multisensor analysis based on luminescent light sources in the short-wave NIR range, in particular, for their application in the dairy.

AB - Optical multisensor systems are easy-to-use and inexpensive analytical devices. In this work, we propose an optical multisensor system based on the luminescence of Nd(III) and Yb(III) complexes in the near-infrared (NIR) spectral region. The observed emission bands play the role of secondary light sources for further analysis of milk—for the determination of fat content and for the recognition of adulteration. The samples for analysis were prepared by putting a drop of milk upon a thin glass covering the powdered mixture of lanthanide complexes, which were excited by a light-emitting diode (LED) in the ultraviolet region (the maximum intensity at 365 nm). The diffuse-reflectance spectra of samples were acquired in the short-wave NIR range 750–1100 nm using a portable NIR spectrometer. The developed optical system was tested using two sets of milk samples with varying concentration levels of fat and added urea. The obtained spectral data were analyzed using a number of multivariate prediction and classification methods of chemometrics and the results were statistically compared. The regression and classification model performances achieved in this proof-of-concept study illustrate the feasibility of the optical multisensor analysis based on luminescent light sources in the short-wave NIR range, in particular, for their application in the dairy.

KW - chemometrics

KW - lanthanide(III) complexes

KW - milk analysis

KW - NIR spectroscopy

KW - optical multisensor system

KW - urea

UR - http://www.scopus.com/inward/record.url?scp=85136154676&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/51c22b4c-4f0e-354d-87d3-94c318adaef5/

U2 - 10.3390/chemosensors10070288

DO - 10.3390/chemosensors10070288

M3 - Article

AN - SCOPUS:85136154676

VL - 10

JO - Chemosensors

JF - Chemosensors

SN - 2227-9040

IS - 7

M1 - 288

ER -