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RESEARCH FRONT
Contents Vol 63(1)

A Study of the Metabolome of Ricinus communis for Forensic Applications

Simon P. B. Ovenden A D , Benjamin R. Gordon B , Christina K. Bagas A , Bob Muir A , Simone Rochfort C and David J. Bourne A
+ Author Affiliations
- Author Affiliations

A Defence Science and Technology Organisation, Fishermans Bend, Vic. 3207, Australia.

B Department of Chemistry, La Trobe University, Bundoora, Vic. 3086, Australia.

C Biosciences Research Division, Department of Primary Industries, Bundoora, Vic. 3083, Australia.

D Corresponding author. Email: simon.ovenden@dsto.defence.gov.au

Australian Journal of Chemistry 63(1) 8-21 https://doi.org/10.1071/CH09293
Submitted: 15 May 2009  Accepted: 23 July 2009   Published: 8 January 2010

Abstract

Investigations were undertaken to ascertain the appropriateness of studying the metabolome of Ricinus communis for cultivar and provenance determination. Seeds from 14 R. communis specimens (a total of 56 seeds) collected from the east coast of Australia were analyzed by high pressure liquid chromatography with UV detection (HPLC-UV), liquid chromatography–mass spectrometry (LC-MS), and 1H NMR spectroscopy. The collected data were then analyzed using principle component analysis (PCA). For HPLC-UV analysis, six R. communis specimens were unambiguously identified by PCA as belonging to separate classes relating to specimen. LC-MS data allowed unique ions to be identified for four specimens. Conversely 10 specimens were unambiguously segregated in the PCA of the 1H NMR data. The ratio of ricinine 1 to demethylricinine analogues 2 and 3 was found to be important for specimen determination. These combined analyses suggested that a combination of HPLC-UV and 1H NMR in conjunction with PCA could allow for specimen differentiation.


Acknowledgements

The authors thank Alex Theo and Justin Doward for their collective efforts toward writing the Microsoft Excel macros used during these studies. They also thank Stuart Thomson for his forthright analysis on aspects of the work, his clear thinking and valuable input into analysis, John Traeger for his support of the work program, and Eloise Pigott for assisting in some of the extraction work. The authors also thank DSTO for the financial support given to Benjamin Gordon during his Honours year.


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