1H-NMR study of unheated and heated marijuana and hashish extracts from cannabis seizures in Egypt


  • Alaa El-Din Gaafar National Research Centre, Cairo, Egypt
  • Omar Abdel -Salam National Research Centre, Cairo, Egypt
  • Shaimaa ElShebiney National Research Centre, Cairo, Egypt
  • Hend Ezzat National Research Centre, Cairo, Egypt


Cannabis; Hashish, Marijuana, Nuclear Magnetic Resonance


: Is to detect the presence of delta-9-tertrahydrocannabinol (THC) and other cannabinoids in samples of cannabis seized in Egypt with the use of nuclear magnetic resonance (1H-NMR). Methods: Extracts of cannabis seizures were prepared from marijuana (the dried flowering tops and leaves) or from hashish (the compressed plant resin). Cannabis extraction was carried out on unheated or heated samples using either chloroform or methanol. 1H-NMR spectrum for cannabis extract was determined in CDCl3 with a JEOL ECA-500. Results: 1H-NMR indicate that the extracts of the cannabis samples contain THC as the major constituent. The 1H-NMR of heated cannabis extracts showed only THC while the 1H-NMR spectra of unheated extracts showed the presence of THC as a major compound beside minor fraction of cannabinol (CBN), both are decraboxylated. Conclusion: The 1H-NMR spectra indicate the presence of THC as the major compound.


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Author Biographies

Alaa El-Din Gaafar, National Research Centre, Cairo, Egypt

Department of Photochemistry, National Research Centre, Cairo, Egypt

Omar Abdel -Salam, National Research Centre, Cairo, Egypt

Department of Toxicology and Narcotics, National Research Centre, Cairo, Egypt

Shaimaa ElShebiney, National Research Centre, Cairo, Egypt

Department of Toxicology and Narcotics, National Research Centre, Cairo, Egypt

Hend Ezzat, National Research Centre, Cairo, Egypt

Department of Spectroscopy, National Research Centre, Cairo, Egypt


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How to Cite

Gaafar, A. E.-D., -Salam, O. A., ElShebiney, S., & Ezzat, H. (2018). 1H-NMR study of unheated and heated marijuana and hashish extracts from cannabis seizures in Egypt. To Chemistry Journal, 1(2), 193-199. Retrieved from https://purkh.com/index.php/tochem/article/view/112



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