《FTIR spectroscopic》.pdfVIP

Spectrochimica Acta Part A 83 (2011) 56–60 Contents lists available at ScienceDirect Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy j o u r n a l h o m e p a g e : w w w. elsev /locate/saa FTIR spectroscopic, thermal and XRD characterization of hydroxyapatite from new natural sources Abdallah A. Shaltout a,b,∗ , Moussa A. Allam a,b , Mohamed A. Moharram a a Spectroscopy Department, Physics Division, National Research Center, El Behooth Str., 12622 Dokki, Cairo, Egypt b Physics Department, Faculty of Science, Taif University, P.O. Box 888, 21974 Taif, Saudi Arabia a r t i c l e i n f o a b s t r a c t Article history: The inorganic constituents of 5 different plants (leaves and stalks) were investigated by using Fourier Received 27 October 2010 transformer infrared spectroscopy (FTIR), X-ray diffraction (XRD) and thermal analysis including thermal Received in revised form 12 April 2011 gravimetric analysis (TGA), derivative thermogravimetry (DTG) and differential scanning calorimetry Accepted 13 July 2011 (DSC). These plants are Catha edulis (Khat), basil, mint, green tea and trifolium. The absorption bands of carbonate ions CO3 2− was exhibited at 1446 cm−1, and the phosphate ions PO4 3− was assigned at 1105 and Keywords: 1035 cm−1. At high temperatures (600, 700 and 600 ◦ C) further absorption bands of the phosphate ions Catha edulis