1097-4555/asset/JRS_left.gif?v=1&s=475c5d1eb68187e9c422b4e837705fad1c054c4c)
1097-4555/asset/JRS_right.gif?v=1&s=12bba9e41976320d842f1cf98eae9a4b27d5913d)
Research Article
Raman microspectrometric investigationof urea in calcite and gypsum powder matrices
Article first published online: 17 MAR 2010
DOI: 10.1002/jrs.2643
Copyright © 2010 John Wiley & Sons, Ltd.
Additional Information
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
Publication History
- Issue published online: 16 DEC 2010
- Article first published online: 17 MAR 2010
- Manuscript Accepted: 3 FEB 2010
- Manuscript Received: 30 NOV 2009
- Abstract
- Article
- References
- Cited By
Keywords:
- urea;
- Raman spectroscopy;
- biomarker;
- gypsum;
- calcite
Abstract
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.