Author:
Ben Amar Ismail,Thomas Andrew,Bachmann Claus,Hafnaoui Anass,Griguer Hafid,Miled Amine,Messaddeq Younès
Abstract
AbstractOnline X-ray Fluorescence (XRF) setup was constructed and optimized for analysing the P2O5 content in phosphate slurry (PS). Serval samples were analysed using two configurations of the setup, one with low and vertical flow and another with high and horizontal flow. The mean absolute error achieved through the first configuration was 0.87% and 0.38% using the second configuration. Reference samples were analyzed using the two configurations to construct the calibration curves. The curves cover a concentration range of P2O5 from 13.50 to 18.50% when considering the horizontal flow configuration, and a range of 14.00–15.60% when considering the vertical flow setup. An experimental study was conducted in order to optimize the measurement parameters for the online measurement of P2O5 in the phosphate slurry using the horizontal flow setup. A good signal-to-noise ratio (SNR) of $$P\left(K\alpha \right)$$
P
K
α
was attained using an excitation energy of 20 kV or 25 kV, an excitation current of 600 µA, a distance of 18 mm between the sample and the detector, a measurement time of 60 s per spectrum and the use of an Aluminum filter between the X-ray tube and the measurement window. Online X-ray fluorescence analysis of P entails some challenges due to the low characteristic energy of P, the phosphate slurry matrix and the online analysis mode. However, the outcomes of this study indicate that XRF is a promising technology to meet the requirement for digitalization of chemical analysis of phosphate products.
Funder
Mohammed VI Polytechnic University
Publisher
Springer Science and Business Media LLC
Reference17 articles.
1. Searchinger, T., Waite, R., Hanson, C. & Ranganathan, J. Creating a sustainable food future. (2019).
2. Thiex, N. J. Determination of phosphorus and potassium in commercial inorganic fertilizers by inductively coupled plasma–optical emission spectrometry: single-laboratory validation, First Action 2015.18. J. AOAC Int. 99, 914–922 (2016).
3. Safi, M. J., Bhagwanth Rao, M., Surya Prakash Rao, K. & Govil, P. K. Chemical analysis of phosphate rock using different methods—advantages and disadvantages. X-Ray Spectrom. 35, 154–158 (2006).
4. Barton, C. J. Photometric analysis of phosphate rock. Anal. Chem. 20, 1068–1073 (1948).
5. Ben Amar, I. et al. Étude des techniques d’analyse du minerai de phosphate et proposition d’un système LIBS à base de FPGA pour la mesure de P2O5 (Université Laval, 2020).