6533b7d4fe1ef96bd12628fb
RESEARCH PRODUCT
Direct determination by portable ED-XRF of mineral profile in cocoa powder samples
Maria Luisa CerveraÁNgel Morales-rubioL. Herreros-chavezsubject
Materials scienceRelative standard deviationPellets01 natural sciencesAnalytical Chemistry0404 agricultural biotechnologyMicrowave assisted digestionLimit of DetectionCalibrationChocolateMicrowavesDetection limitCacaoMineralsMineralChromatography010401 analytical chemistrySpectrometry X-Ray Emission04 agricultural and veterinary sciencesGeneral Medicine040401 food science0104 chemical sciencesSpectrophotometryReagentInductively coupled plasma atomic emission spectroscopyFood Sciencedescription
Abstract The present study has exploited the rapidity of the analysis and the multi-elemental capability of the energy dispersive X- ray fluorescence (ED-XRF) technique for the mineral profile determination in cocoa powder. A fast, cheap and environmental sustainable method without reagent consumption or toxic waste generation has been proposed. The samples can be prepared in the form of pellets of 13 mm in diameter and 2–3 mm thickness. The different internal calibrations used by ED-XRF equipment did not provide accurate results when comparing the mineral profile with the concentration obtained by Inductively Couple Plasma Optical Emission Spectroscopy (ICP-OES) after microwave assisted digestion of samples. For direct ED-XRF analysis of the cocoa samples, an external calibration using as standards the cocoa samples diluted with sugar was prepared. The analytical parameters of Relative Standard Deviation and Limit of Detection for the determined elements are adequate to the concentration levels found in the samples.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-04-01 | Food Chemistry |