PUMA
Istituto di Geoscienze e Georisorse     
Baggio B., Giannossi M., Medici L., Summa V., Tateo F. X-ray microdiffraction and urine: A new analysis method of crystalluria. In: Journal of X-Ray Science and Technology, vol. 20 pp. 489 - 498. IOS Press, 2012.
 
 
Abstract
(English)
The qualitative and quantitative analyses of crystalluria have clinical significance in the diagnosis and prognosis of urolithiasis. The aim of this paper is to provide a new accurate methodology to get qualitative and quantitative data on urine particulate in patients with renal stone disease. The procedure involves a urine collection, the separation of the solid residual by centrifugation, and its analysis by X-ray diffraction, utilizing a micro-diffractometer in order to analyze very low amounts of residual. The spectrum obtained was converted into 2θ-I profiles and quantitatively refined by Rietveld method. The proposed methodology has the advantage to accurately quantify all crystalline phases and the amorphous component of the urine; anyway urine samples have to be centrifuged and analysed as soon as possible, because the quantitative results obtained by the X-ray microdiffraction showed that after some days and at room temperature urine increased significantly both amorphous and crystalline phases.
URL: http://www.iospress.nl/journal/journal-of-x-ray-science-and-technology/
Subject crystalluria
X-ray diffraction
Urolithiasis
Rietveld method
mineralogical composition


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