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GLC and c o l o r i m e t r i c methods f o r Capsaicin and i t s dosage forms are i nvestigated. GLC method i s based on t h e formation o f methyl d e r i v a t i v e o f capsaicin. The c o l o r i m e t r i c procedure i s based on the formation o f 0 -n i t r o s o -d e r i v a t i v e between t h e drug and sodium n i t r i t e .

El-Sibaiya phosphorites represent a part of the Middle East to North Africa phosphogenic province. They encountered in the Gabal (G.) Duwi Formation of Late Cretaceous to Paleogene age. The studied samples have been collected from the eastern and western sides of the Nile River.Major elemental analysis of the collected samples declared positive correlations between P 2 O 5 and CaO and F. These correlations indicate that these elements are contained in the apatite phase. On the other hand, P 2 O 5 shows negative correlations with other major elements such as Al 2 O 3 , SiO 2 , Fe 2 O 3 and MgO. Some trace elements such Cr, Sr and V show positive correlation with P 2 O 5 .The average of the total rare earth elements (∑REEs) in the studied phosphorites is 262ppm. Chondrite-normalized patterns of ∑REEs of the studied phosphorites show a good coherence with the world average of shale suggesting that ∑REEs in the studied phosphorites were derived from the associated clastic debris through the diagenetic remobilization. The week negative Ce and Eu anomaly of the studied samples and the marked enrichment in LREEs emphasize that the studied phosphorites subjected to a later post-depositional modification.Laser ablation analysis showed that apatite mineral of the studied phosphorites is enriched in some elements such as Ca, F, Cr, Sr, V, Zn, Ba and REEs. This explains the major role of substitution processes of these elements within apatite lattice.The uranium average in El-Sibaiya East phosphorites is 81.6 ppm, while in El-Sibaiya West is 51.1ppm. Apatite minerals play an important role in the accumulation of U within the studied phosphorites.