Application of Infrared Spectroscopy to the Study of Renal Stones

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Abstract
SummaryInfrared spectroscopy has been applied to the determination of components in more than 300 renal stones. The KBr pellet technique was chosen. In many cases, the study was carried out on small sections of the calculus that had been selected previously by optical microscopy. The spectral region studied was from 4,000 to 250 cm-1, which is wider than that normally studied by other authors. It has been found that the region below 800 cm-1 is the most appropriate for quantitative determination of some of the components.The infrared technique uses a very small quantity of sample (0.1-1 mg), allowing the analysis of different layers of the calculus. 1t is also adequate for the study of amorphous or poorly-crystallized materials, making its application most convenient for this kind of study.Quantitative determinations of several components dispersed in KBr have also been carried out.

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