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Rapid analysis of magnesium in infant formula powder using laser-induced breakdown spectroscopy.
- Source :
-
International Dairy Journal . Oct2019, Vol. 97, p57-64. 8p. - Publication Year :
- 2019
-
Abstract
- 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 (R cv 2 = 0.94 and R p 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. [ABSTRACT FROM AUTHOR]
- Subjects :
- *INFANT formulas
*LASER-induced breakdown spectroscopy
Subjects
Details
- Language :
- English
- ISSN :
- 09586946
- Volume :
- 97
- Database :
- Academic Search Index
- Journal :
- International Dairy Journal
- Publication Type :
- Academic Journal
- Accession number :
- 137972923
- Full Text :
- https://doi.org/10.1016/j.idairyj.2019.05.010