TY - JOUR
T1 - Rapid analysis of magnesium in infant formula powder using laser-induced breakdown spectroscopy
AU - Markiewicz-Keszycka, M.
AU - Zhao, Ming
AU - Cama-Moncunill, Xavier
AU - El Arnaout, Toufic
AU - Becker, Dana
AU - O'Donnell, Colm
AU - Cullen, Patrick J.
AU - Sullivan, Carl
AU - Casado-Gavalda, Maria P.
N1 - Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/10
Y1 - 2019/10
N2 - Laser-induced breakdown spectroscopy (LIBS) was investigated to determine magnesium (Mg) content in infant formula powder. To predict Mg content in the range established by the Codex Alimentarius, a partial least squares regression (PLSR) model was developed using a calibration data set (n = 30) based on full cross-validation and validated using an independent validation data set (n = 21). The prediction model performance was evaluated using the regression coefficients of determination (Rcv 2 = 0.94 and Rp 2 = 0.85) with the root mean square errors on cross-validation and prediction (RMSECV = 60 mg kg−1 and RMSEP = 80 mg kg−1). The limit of detection (150 mg kg−1) was also calculated. In addition, LIBS successfully predicted the Mg content distributed within a pellet. This study demonstrated that LIBS is suitable as a rapid reagent-free method for the quantification of Mg in powdered infant formula and can provide spatial information with acceptable accuracy.
AB - Laser-induced breakdown spectroscopy (LIBS) was investigated to determine magnesium (Mg) content in infant formula powder. To predict Mg content in the range established by the Codex Alimentarius, a partial least squares regression (PLSR) model was developed using a calibration data set (n = 30) based on full cross-validation and validated using an independent validation data set (n = 21). The prediction model performance was evaluated using the regression coefficients of determination (Rcv 2 = 0.94 and Rp 2 = 0.85) with the root mean square errors on cross-validation and prediction (RMSECV = 60 mg kg−1 and RMSEP = 80 mg kg−1). The limit of detection (150 mg kg−1) was also calculated. In addition, LIBS successfully predicted the Mg content distributed within a pellet. This study demonstrated that LIBS is suitable as a rapid reagent-free method for the quantification of Mg in powdered infant formula and can provide spatial information with acceptable accuracy.
UR - https://www.scopus.com/pages/publications/85068252676
U2 - 10.1016/j.idairyj.2019.05.010
DO - 10.1016/j.idairyj.2019.05.010
M3 - Article
AN - SCOPUS:85068252676
SN - 0958-6946
VL - 97
SP - 57
EP - 64
JO - International Dairy Journal
JF - International Dairy Journal
ER -