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Porcu S, Tuveri E, Palanca M, Melis C, La Franca IM, Satta J, Chiriu D, Carbonaro CM, Cortis P, De Agostini A, Ricci PC. Rapid In Situ Detection of THC and CBD in Cannabis sativa L. by 1064 nm Raman Spectroscopy. Anal Chem 2022; 94:10435-10442. [PMID: 35848818 PMCID: PMC9330313 DOI: 10.1021/acs.analchem.2c01629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
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The need to find a rapid and worthwhile technique for
the in situ
detection of the content of delta-9-tetrahydrocannabinol (THC) and
cannabidiol (CBD) in Cannabis sativa L. is an ever-increasing problem in the forensic field. Among all
the techniques for the detection of cannabinoids, Raman spectroscopy
can be identified as the most cost-effective, fast, noninvasive, and
nondestructive. In this study, 42 different samples were analyzed
using Raman spectroscopy with 1064 nm excitation wavelength. The use
of an IR wavelength laser showed the possibility to clearly identify
THC and CBD in fresh samples, without any further processing, knocking
out the contribution of the fluorescence generated by visible and
near-IR sources. The results allow assigning all the Raman features
in THC- and CBD-rich natural samples. The multivariate analysis underlines
the high reproducibility of the spectra and the possibility to distinguish
immediately the Raman spectra of the two cannabinoid species. Furthermore,
the ratio between the Raman bands at 1295/1440 and 1623/1663 cm–1 is identified as an immediate test parameter to evaluate
the THC content in the samples.
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Affiliation(s)
- Stefania Porcu
- Department of Physics, University of Cagliari, S.p. no. 8 Km 0700, 09042 Monserrato, CA, Italy
| | - Enrica Tuveri
- Scientific Investigation Department (RIS) of Cagliari, Via Ludovico Ariosto, 24, 09129 Cagliari, CA, Italy
| | - Marco Palanca
- Scientific Investigation Department (RIS) of Cagliari, Via Ludovico Ariosto, 24, 09129 Cagliari, CA, Italy
| | - Claudia Melis
- Scientific Investigation Department (RIS) of Cagliari, Via Ludovico Ariosto, 24, 09129 Cagliari, CA, Italy
| | | | - Jessica Satta
- Department of Physics, University of Cagliari, S.p. no. 8 Km 0700, 09042 Monserrato, CA, Italy
| | - Daniele Chiriu
- Department of Physics, University of Cagliari, S.p. no. 8 Km 0700, 09042 Monserrato, CA, Italy
| | - Carlo Maria Carbonaro
- Department of Physics, University of Cagliari, S.p. no. 8 Km 0700, 09042 Monserrato, CA, Italy
| | - Pierluigi Cortis
- Department of Life and Environmental Sciences, University of Cagliari, Via Sant'Ignazio 13, 09123 Cagliari, CA, Italy
| | - Antonio De Agostini
- Department of Life and Environmental Sciences, University of Cagliari, Via Sant'Ignazio 13, 09123 Cagliari, CA, Italy
| | - Pier Carlo Ricci
- Department of Physics, University of Cagliari, S.p. no. 8 Km 0700, 09042 Monserrato, CA, Italy
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