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Carbon and nitrogen stable isotopes as indicative of geographical origin of marijuana samples seized in the city of São Paulo (Brazil). | LitMetric

Carbon and nitrogen stable isotopes as indicative of geographical origin of marijuana samples seized in the city of São Paulo (Brazil).

Forensic Sci Int

Laboratório de Caracterização Química e Isotópica, Centro de Química e Meio Ambiente, Instituto de Pesquisas Energéticas e Nucleares, IPEN/CNEN-SP, Av. Lineu Prestes 2242, Cidade Universitária, São Paulo/SP CEP 05508-000, Brazil.

Published: March 2007

AI Article Synopsis

  • * The research utilized stable carbon and nitrogen isotopes linked to climate and plant growth to create a model for identifying the origin of seized marijuana samples, employing linear discriminant analysis on about 150 samples.
  • * Analysis of 76 seized samples indicated most originated from a humid region similar to Mato Grosso do Sul, while 13 outlier samples from the Northeast hinted at routes between the Northeast and Midwest, likely due to federal crackdowns since 1999.

Article Abstract

The drug trafficking is one of the most serious problems related to the Public Safety in Brazil, especially in the most populous areas of the country, as is the case of the city of São Paulo. In this work, it was developed a methodology that can help tracking the traffic routes of marijuana samples seized in the city of São Paulo, based on stable carbon and nitrogen isotopes, which are related to the climate and plant growth conditions. A model to classify the origin of unknown samples was built using linear discriminant analysis based on about 150 samples apprehended in the main producing regions of the country. Results for 76 samples seized in the city of São Paulo showed that most of them were cultivated in a humid region with the same origin as those from Mato Grosso do Sul. The provenance of 13 outliers samples from Northeast region (an important producing region) also were evaluated and some of them presented same profile of those from Mato Grosso do Sul, pointing to the existence of the traffic routes between the Northeast and Midwest region, probably as a consequence of the intensive field raids by Brazilian Federal Government since 1999.

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Source
http://dx.doi.org/10.1016/j.forsciint.2006.06.002DOI Listing

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