Development of a Method for the Elemental Analysis of Milk Powders Using Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry (LA-ICP-MS) and its Potential Use in Geographic Sourcing

TRICIA HOFFMAN; RADOJKO JAĆIMOVIĆ; LIAN JIE BAY; JULIETA GRIBOFF; MARTA JAGODIC; MAGDALENA MONFERRÁN; NIVES OGRINC; DANIEL WUNDERLIN; JOSE ALMIRALL

TALANTA

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2018

0039-9140

ilk has been reported as one of the most adulterated foodstuffs in the developed and developing world. One way to detect adulteration is to determine whether the country of origin on the label could be the actual country of origin. Such profiling may be accomplished through the use of elemental analysis techniques, however this is a preliminary study and this goal is not yet met. In this study, a laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) method was developed for the analysis of solid milk powder and compared to k0-instrumental neutron activation analysis (k0-INAA) for a reference milk material (IAEA-153) as well as several milk samples from different countries. The analytical figures of merit for both the LA-ICP-MS and the k0-INAA analysis are reported. Precision of ~ 10% RSD or better was achieved for most elements for both techniques and bias of ~ 10% was achieved for both techniques for most elements with LA-ICP-MS producing lower limits of detection (