Journal: Spectrochimica Acta Part B: Atomic Spectroscopy
Paper: Laser-induced breakdown spectroscopy application to control of the process of precious metal recovery and recycling
AUTHORS: S. Legnaiolia, G. Lorenzettia, L. Pardinia, V. Palleschia, D.M. Diaz Paceb, F. Anabitarte Garcia, R. Grassid, F. Sorrentinod, G. Carellid, M. Francesconid, F. Francesconid, R. Borgognie
Abstracts: In this paper, we discuss the application of laser-induced breakdown spectroscopy to precious metal alloys used for the control of the process of recovery and recycling of scraps and waste of industrial processes. In particular, the possibility to obtain sensitivity and trueness comparable to the current systems used in industrial environment in the quantitative determination of the elements of interest was explored. The present study demonstrates that laser-induced breakdown spectroscopy can be considered as a viable alternative to inductively coupled plasma optical emission spectrometry and X-ray fluorescence spectroscopy for the determination of recovered precious metals. The limits of detection obtained are of the order of 0.2 mg/g for all the elements considered. The maximum deviation with respect to the nominal concentrations is around 1 mg/g at concentrations around 20 mg/g (gold) corresponding to a relative error slightly higher than ±5%.
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Premio para un Proyecto Fin de Carrera |
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Reconocimiento otorgado a trabajo doctoral desarrollado en el Grupo de Ingeniería Fotónica de la UC |
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Journal: Quantitative InfraRed Thermography
Paper: Pre-processing techniques of thermal sequences applied to online welding monitoring
AUTHORS: Rafael Hidalgo-Gato, Patricia Mingo, Jose Miguel Lopez-Higuera, Francisco J. Madruga
Abtracts: This paper outlines a pre-processing technique to improve the stabilisation and matching results of thermal imaging sequences of online welding monitoring processes, where measurements have been affected by vibrations in the sensor holder structure. For that purpose, the used method, based on point tracking and direct phase substitution, will be described and subsequently tested with two thermogram sequences, one obtained in laboratory and the other one from a welding monitoring process.
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