ED-XRF as a tool for rapid minerals control in milk-based products.
An ED-XRF method for the rapid determination of a series of analytes (phosphorus, sulfur, chlorine, potassium, calcium, iron, zinc) in milk-based products has been developed and validated. The investigated samples were commercial products obtained from various parts of the world. Reference values measured by inductively-coupled plasma-optical emission spectroscopy and by potentiometry for chloride were used to calibrate the ED-XRF. Calibrations were established with 30 samples, and validation was made using a second set of 30 samples. An evaluation of this alternative method was done by comparison with data from the reference methods. Pellets of 4 g were prepared under 2 tons of pressure. For each sample, 3 pellets were prepared and analyzed. Limits of quantification and repeatabilities were evaluated for the described analytes.
Perring
Loïc
L
Minerals Laboratory, Department of Quality and Safety Assurance, Nestlé Research Centre, Vers chez-les-Blanc, CH-1000, Lausanne26, Switzerland. loic.perring@rdls.nestle.com
Andrey
Daniel
D
D000818:Animals; D002118:Calcium / Q000032:analysis; D002138:Calibration; D002713:Chlorine / Q000032:analysis; D003611:Dairy Products / Q000032:analysis; D007501:Iron / Q000032:analysis; D008892:Milk / Q000737:chemistry*; D008903:Minerals / Q000032:analysis*; D010758:Phosphorus / Q000032:analysis; D011188:Potassium / Q000032:analysis; D012016:Reference Values; D015203:Reproducibility of Results; D013052:Spectrometry, X-Ray Emission; D013455:Sulfur / Q000032:analysis; D015032:Zinc / Q000032:analysis
D008903:Minerals; D010758:Phosphorus; D002713:Chlorine; D013455:Sulfur; D007501:Iron; D015032:Zinc; D011188:Potassium; D002118:Calcium