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FT-Raman Spectroscopy: A Tool for Monitoring the Demineralization of Bones

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Abstract:

A nondestructive analytical method based on the use of Fourier transform Raman spectroscopy (FT-RS) for identification and quantitative analysis of hydroxyapatite (HAP) and collagen (COL) in bones was developed. A calibration curve based on the Raman spectra of known powder mixtures of HAP-COL was constructed with the use of the Raman bands at 960 cm-1 for HAP and 2937 cm-1 for COL. It was found that I 960/I 2937 = 0.46/Wc - 0.36, where I960 and I2937 are the relative intensities for the 960 and 2937 cm-1 Raman bands, respectively, and Wc represents the weight fraction of collagen. The detection limit for HAP and COL was found to be 2.8 and 0.6 wt %, respectively. The potential of using RS for an in vitro point-by-point analysis ("mapping") of bones was demonstrated successfully on an artificially demineralized ox femur sample.

Keywords: ANALYSIS; BONE; COLLAGEN; FOURIER; HYDROXYAPATITE; RAMAN; SPECTROSCOPY; TRANSFORM

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702001948853

Affiliations: 1: Department of Pharmacy, University of Patras, GR 26500, Patras, Greece and Institute of Chemical Engineering and High Temperature Chemical Processes, FORTH, P.O. Box 1414, Patras, Greece 2: Department of Pharmacy, University of Patras, GR 26500, Patras, Greece

Publication date: November 1, 2000

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