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Reconstitution followed by non-targeted mid-infrared analysis as a workable and cost-effective solution to overcome the blending duality in milk powder adulteration detection.
- Source :
-
Food Chemistry . Oct2019, Vol. 295, p42-50. 9p. - Publication Year :
- 2019
-
Abstract
- • Reconstitution of powder milk prior to mid-IR analysis is proposed to overcome the blending duality. • Semicarbazide, ammonium sulfate and cornstarch were used to challenge the proposal. • Wet-blended adulterated milk powders were generated using a benchtop spray dryer. • The mid-IR model for reconstituted milk showed comparable sensitivities to both blending practices. Mid-infrared analysis of reconstituted milk is proposed as a feasible solution for the detection of milk powder adulteration regardless of the blending practice. To challenge the concept, skim milk powders were spiked with three of the most reactive/unstable of potential milk adulterants: semicarbazide hydrochloride, ammonium sulfate and cornstarch. To create the wet-blended set, a fraction of each sample was reconstituted and re-spray dried at laboratory scale with a benchtop spray dryer. Dry and wet-blended adulterated samples were reconstituted prior to mid-infrared measurement and projected onto a one-class classifier SIMCA model for reconstituted skim milk. Quantitative sensitivities, determined from the normalized orthogonal distances, were compared. Although the non-industrial spray drying introduced a spectroscopic bias, as revealed by the control samples, the non-targeted mid-infrared model showed comparable sensitivities for both blending practices once the main bias-rich spectral regions were removed, validating thereby the proposed concept. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ADULTERATIONS
*DRIED milk
*SPRAY drying
*SKIM milk
*AMMONIUM sulfate
*CORNSTARCH
Subjects
Details
- Language :
- English
- ISSN :
- 03088146
- Volume :
- 295
- Database :
- Academic Search Index
- Journal :
- Food Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 136803470
- Full Text :
- https://doi.org/10.1016/j.foodchem.2019.05.100