Raman microspectrometric investigationof urea in calcite and gypsum powder matrices
Article first published online: 17 MAR 2010
Copyright © 2010 John Wiley & Sons, Ltd.
Journal of Raman Spectroscopy
Volume 41, Issue 12, pages 1743–1747, December 2010
How to Cite
Culka, A. and Jehlička, J. (2010), Raman microspectrometric investigationof urea in calcite and gypsum powder matrices. J. Raman Spectrosc., 41: 1743–1747. doi: 10.1002/jrs.2643
- Issue published online: 16 DEC 2010
- Article first published online: 17 MAR 2010
- Manuscript Accepted: 3 FEB 2010
- Manuscript Received: 30 NOV 2009
- Raman spectroscopy;
Raman microspectrometry was used for the nondestructive detection of urea in artificially prepared mineral matrices. Various concentrations of urea, a possible biomarker, mixed with calcite and gypsum powders were analyzed using the 514.5-nm line of an argon laser. Two types of measurements were carried out: direct measurements of powders and analysis of the same mixtures through natural, transparent crystals of calcite and gypsum. The detection limit for urea in artificial powder mixtures was 1 wt% for both calcite and gypsum. In the case of measurements through the monocrystals, the detection limit was between 1 and 5 wt% for calcite and slightly above 5 wt% in the case of gypsum. Copyright © 2010 John Wiley & Sons, Ltd.