Non-Invasive Method to Predict the Composition of Requeijão Cremoso Directly in Commercial Packages Using Time Domain NMR Relaxometry and Chemometrics

Low Field Time-Domain Nuclear Magnetic Resonance (TD-NMR) relaxometry was used to determine moisture, fat, and defatted dry matter contents in “requeijão cremoso” (RC) processed cheese directly in commercial packaged (plastic cups or tubes with approximately 200 g). Forty-five samples of commercial...

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Bibliographic Details
Published in:Molecules (Basel, Switzerland) Vol. 27; no. 14; p. 4434
Main Authors: de Oliveira Machado, G., Teixeira, Gustavo Galastri, Garcia, Rodrigo Henrique dos Santos, Moraes, Tiago Bueno, Bona, Evandro, Santos, Poliana M., Colnago, Luiz Alberto
Format: Journal Article
Language:English
Published: Basel MDPI AG 11.07.2022
MDPI
Subjects:
CPMG
CWFP-T1
Food
Laplace transforms
Magnetic fields
Milk
Moisture content
OPS
PLS
Quality control
requeijão cremoso
TD-NMR
Brazil
United States > US
ISSN:1420-3049, 1420-3049
Online Access:Get full text
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Summary:Low Field Time-Domain Nuclear Magnetic Resonance (TD-NMR) relaxometry was used to determine moisture, fat, and defatted dry matter contents in “requeijão cremoso” (RC) processed cheese directly in commercial packaged (plastic cups or tubes with approximately 200 g). Forty-five samples of commercial RC types (traditional, light, lactose-free, vegan, and fiber) were analyzed using longitudinal (T1) and transverse (T2) relaxation measurements in a wide bore Halbach magnet (0.23 T) with a 100 mm probe. The T1 and T2 analyses were performed using CWFP-T1 (Continuous Wave Free Precession) and CPMG (Carr-Purcell-Meiboom-Gill) single shot pulses. The scores of the principal component analysis (PCA) of CWFP-T1 and CPMG signals did not show clustering related to the RC types. Optimization by variable selection was carried out with ordered predictors selection (OPS), providing simpler and predictive partial least squares (PLS) calibration models. The best results were obtained with CWFP-T1 data, with root-mean-square errors of prediction (RMSEP) of 1.38, 4.71, 3.28, and 3.00% for defatted dry mass, fat in the dry and wet matter, and moisture, respectively. Therefore, CWFP-T1 data modeled with chemometrics can be a fast method to monitor the quality of RC directly in commercial packages.
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ISSN:1420-3049
1420-3049
DOI:10.3390/molecules27144434