can any one tell me a website , a book or something else to help me to understand chromatography?
I used this book when I was studying Chromatography. I believe that it has a very good explanation of chromatography, its uses, and the different kinds of chromatography. Of course, you can also run a quick search for chromatography on OpenSource MIT classes. https://ocw.mit.edu/courses/chemistry/index.htm
Here is the book: https://www.amazon.com/gp/product/B001KR6YL6/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1
Hope this helps!
Start with Wikipedia for an overview then look thru their referecession for more books/sites.
Here are some sites that will explain chromatography:
Here is a site that will explain how it is used:
Here are some companies in Egypt that you can contact to explore more about chromatography:
Best of luck! Please let me know if and how this helps. Please keep me informed. I would like to follow your progress.