A Smart Sample Preparation Method For Chocolate Analysis |
|---|
| Fabjola Bilo, Laura Borgese, Rogerta Dalipi, Annalisa Zacco, Elza Bontempi, Laura E. Depero |
- Abstract:
- Fast, simple and reliable methods are necessary for quality control of food sample that will guarantee the food safety and human health. Total reflection X-Ray Fluorescence (TXRF) spectroscopy is suitable for elemental analysis of food, since it provides simultaneous multielemental identification in a wide dynamic range of concentration. Moreover, TXRF is successfully applied for sample screening. This study proposes a new approach of sample preparation procedure developed by Smart Store for elemental chemical analysis of foods by means of TXRF. The method consists in sandwiching the chocolate sample into two polymeric foils, free from heavy metals content, allowing to protect it from external contamination, to avoid any material loss and to store it for further investigations. After preparation, the samples can be directly analysed. Furthermore, in this work the total solubilisation of the samples by microwave acid digestion was performed. Quantitative analysis by means of internal standard addition was performed for all samples. Good agreement results was achieved for both sample preparation procedures.
- Keywords:
- heavy metals, direct analysis, TXRF, chocolate, screening
- Download:
- IMEKO-TC23-2016-032.pdf
- DOI:
- -